San Diego metropolitan area
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San Diego County (), officially the County of San Diego, is a
county A county is a geographic region of a country used for administrative or other purposes Chambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...
in the southwestern corner of the U.S. state of
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fifth-most populous in the United States. Its
county seat A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in Canada, China, Hungary, Romania, Taiwan, and the United States. The equivalent term shire town is used in the US ...
is
San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
, the second-most populous city in California and the eighth-most populous city in the United States. It is the southwesternmost county in the 48
contiguous United States The contiguous United States (officially the conterminous United States) consists of the 48 adjoining U.S. states and the Federal District of the United States of America. The term excludes the only two non-contiguous states, Alaska and Hawaii ...
, and is a border county. It is also home to 18 Native American tribal reservations, the most of any county in the United States. San Diego County comprises the San Diego-Chula Vista-Carlsbad, CA Metropolitan Statistical Area, which is the 17th most populous
metropolitan statistical area In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally incorporated as a city or tow ...
and the 18th most populous primary statistical area of the United States as of July 1, 2012. San Diego County is also part of the San Diego–Tijuana transborder metropolitan area, the largest metropolitan area shared between the United States and
Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...
. San Diego County has more than of coastline. This forms the most densely populated region of the county, which has a mild
Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on ...
to semiarid climate and extensive
chaparral Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranea ...
vegetation, similar to the rest of the western portion of Southern California. Precipitation and temperature extremes increase to the east, with mountains that receive frost and snow in the winter. These lushly forested mountains receive more rainfall than the average in Southern California, while the desert region of the county lies in a
rain shadow A rain shadow is an area of significantly reduced rainfall behind a mountainous region, on the side facing away from prevailing winds, known as its leeward side. Evaporated moisture from water bodies (such as oceans and large lakes) is ca ...
to the east, which extends into the
Desert Southwest The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, ...
region of North America. There are 16 military installations, of the U.S. Navy,
U.S. Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through co ...
, and the U.S. Coast Guard in San Diego County. These include
Naval Base San Diego Naval Base San Diego, also known as 32nd Street Naval Station, is the second largest surface ship base of the United States Navy and is located in San Diego, California. Naval Base San Diego is the principal homeport of the Pacific Fleet, con ...
, Marine Corps Base Camp Pendleton,
Marine Corps Air Station Miramar Marine Corps Air Station Miramar (MCAS Miramar) , formerly Naval Auxiliary Air Station (NAAS) Miramar and Naval Air Station (NAS) Miramar, is a United States Marine Corps installation that is home to the 3rd Marine Aircraft Wing, which is the av ...
,
Naval Air Station North Island Naval Air Station North Island or NAS North Island , at the north end of the Coronado peninsula on San Diego Bay in San Diego, California, is part of the largest aerospace-industrial complex in the United States Navy – Naval Base Coronado ...
, and Coast Guard Air Station San Diego. From north to south, San Diego County extends from the southern borders of Orange and Riverside Counties to the Mexico-U.S. border and the
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
municipalities A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality'' may also mean the ...
of
Tijuana Tijuana ( ,"Tijuana"
(US) and
< ...
and
Tecate Tecate () is a city in Tecate Municipality, Baja California. It is across the Mexico-US border from Tecate, California. As of 2019, the city had a population of 108,860 inhabitants, while the metropolitan area has a population of 132,406 inhab ...
. From west to east, San Diego County stretches from the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...
to its boundary with Imperial County, which separated from it in 1907. Since 2010, statewide droughts in California have further strained San Diego County's water security.


History

The area which is now San Diego County has been inhabited for more than 12,000 years by
Kumeyaay The Kumeyaay, also known as Tipai-Ipai or by their historical Spanish name Diegueño, is a tribe of Indigenous peoples of the Americas who live at the northern border of Baja California in Mexico and the southern border of California in the Unit ...
(also called Diegueno and Ipai/Tipai), Payómkawichum (Luiseño), Kuupangaxwichem (Cupeño), ʔívil̃uqaletem (Cahuilla), and the Acjachemen (Juaneño) Indians and their local predecessors. In 1542, the explorer
Juan Rodríguez Cabrillo Juan Rodríguez Cabrillo ( pt, João Rodrigues Cabrilho; c. 1499 – January 3, 1543) was an Iberian maritime explorer best known for investigations of the West Coast of North America, undertaken on behalf of the Spanish Empire. He was the firs ...
, who may have been born in
Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of th ...
but sailed under the flag of Castile, claimed
San Diego Bay San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S.–Mexico border. The bay, which is long and wide, is the third largest of the three large, protected natural bays on California's of ...
for the
Spanish Empire The Spanish Empire ( es, link=no, Imperio español), also known as the Hispanic Monarchy ( es, link=no, Monarquía Hispánica) or the Catholic Monarchy ( es, link=no, Monarquía Católica) was a colonial empire governed by Spain and its prede ...
, and he named the site San Miguel. In November 1602, Sebastián Vizcaíno surveyed the harbor and what are now Mission Bay and Point Loma and named the area for Saint Didacus, a Spaniard more commonly known as San Diego. European settlement in what is now San Diego County began with the founding of the
San Diego Presidio El Presidio Real de San Diego (Royal Presidio of San Diego) is a historic fort in San Diego, California. It was established on May 14, 1769, by Gaspar de Portolá, leader of the first European land exploration of Alta California—at that time a ...
and
Mission San Diego de Alcalá Mission Basilica San Diego de Alcalá ( es, Misión San Diego de Alcalá) was the second Franciscan founded mission in The Californias (after San Fernando de Velicata), a province of New Spain. Located in present-day San Diego, California, ...
by Spanish soldiers and clerics in 1769. This county was part of
Alta California Alta California ('Upper California'), also known as ('New California') among other names, was a province of New Spain, formally established in 1804. Along with the Baja California peninsula, it had previously comprised the province of , but ...
under the Viceroyalty of New Spain until the
Mexican declaration of independence The Declaration of Independence of the Mexican Empire ( es, Acta de Independencia del Imperio Mexicano) is the document by which the Mexican Empire declared independence from the Spanish Empire. This founding document of the Mexican nation was d ...
. From 1821 through 1848 this area was part of
Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...
. San Diego County became part of the United States as a result of the
Treaty of Guadalupe Hidalgo The Treaty of Guadalupe Hidalgo ( es, Tratado de Guadalupe Hidalgo), officially the Treaty of Peace, Friendship, Limits, and Settlement between the United States of America and the United Mexican States, is the peace treaty that was signed on 2 ...
in 1848, ending the
Mexican–American War The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the (''United States intervention in Mexico''), was an armed conflict between the United States and Mexico from 1846 to 1848. It followed the ...
. This treaty designated the new border as terminating at a point on the Pacific Ocean coast which would result in the border passing one Spanish league south of the southernmost portion of
San Diego Bay San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S.–Mexico border. The bay, which is long and wide, is the third largest of the three large, protected natural bays on California's of ...
, thus ensuring that the United States received all of this natural harbor. San Diego County was one of the original counties of California, created at the time of California statehood in 1850. At the time of its establishment in 1850, San Diego County was relatively large, and included all of southernmost California south and east of
Los Angeles County Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the List of the most populous counties in the United States, most populous county in the United States and in the U.S. state of California, ...
. It included areas of what are now
Inyo Inyo may refer to: Places California * Inyo County, California * Inyo National Forest, USA * The Inyo Mountains * The Mono–Inyo Craters Other uses * Japanese for yin and yang Yin and yang ( and ) is a Chinese philosophical concep ...
and San Bernardino Counties, as well as all of what are now Riverside and
Imperial Imperial is that which relates to an empire, emperor, or imperialism. Imperial or The Imperial may also refer to: Places United States * Imperial, California * Imperial, Missouri * Imperial, Nebraska * Imperial, Pennsylvania * Imperial, Texas ...
Counties. During the later part of the 19th century, there were numerous changes in the boundaries of San Diego County, when various areas were separated to make up the counties mentioned above. The most recent changes were the establishments of Riverside County in 1893 and Imperial County in 1907. Imperial County was also the last county to be established in California, and after this division, San Diego no longer extended from the Pacific Ocean to the
Colorado River The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid watershed that encompasses parts of seven U.S. s ...
, and it no longer covered the entire border between California and Mexico.


Geography

According to the
U.S. Census Bureau The United States Census Bureau (USCB), officially the Bureau of the Census, is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy. The Census Bureau is part of the ...
, the county has an area of , of which is land and (7.0%) is water. The county is larger in area than the combined states of Rhode Island and Delaware. San Diego County has a varied topography. On its western side is more than of coastline. Most of San Diego between the coast and the Laguna Mountains consists of hills, mesas, and small
canyon A canyon (from ; archaic British English spelling: ''cañon''), or gorge, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency to cu ...
s. Snow-capped (in winter) mountains rise to the east, with the
Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Ariz ...
farther to the east.
Cleveland National Forest Cleveland National Forest encompasses 460,000 acres (), mostly of chaparral, with a few riparian areas. A warm dry mediterranean climate prevails over the forest. It is the southernmost U.S. National Forest of California. It is administered by ...
is spread across the central portion of the county, while the Anza-Borrego Desert State Park occupies most of the northeast. Although the county's western third is primarily urban, the mountains and deserts in the eastern two-thirds are primarily undeveloped backcountry. Most of these backcountry areas are home to a native plant community known as
chaparral Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranea ...
. San Diego County contains more than of chaparral, twice as much as any other California county. North San Diego County is known as North County; the exact geographic definitions of "North County" vary, but it includes the northern suburbs and sometimes certain northern neighborhoods of the
city of San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
. The eastern suburbs are collectively known as
East County East County is a region of San Diego County, California, east of San Diego. Geography East County does not have an official geographic definition, although East County boundaries are unofficially drawn by the County of San Diego for its second d ...
, though most still lie in the western third of the county. The southern suburbs and southern detached portion of the city of San Diego, extending to the Mexican border, are collectively referred to as South Bay. Periodically the area has been subject to
wildfire A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identi ...
s that force thousands to evacuate. The most recent are the December 2017
Lilac Fire The Lilac Fire was a fire that burned in northern San Diego County, California, United States, and the second-costliest one of multiple wildfires that erupted in Southern California in December 2017. The fire was first reported on December 7, 2 ...
and the
May 2014 San Diego County wildfires The May 2014 San Diego County wildfires were a swarm of 20 wildfires that erupted during May 2014, in San Diego County, California, during severe Santa Ana Wind conditions, historic drought conditions, and a heat wave. The main event during mid- ...
; before them was the
Witch Creek Fire The Witch Creek Fire, also known as the Witch Fire and the Witch-Guejito–Poomacha Complex Fire, was the second-largest wildfire of the 2007 California wildfire season, and the largest one of the October 2007 California wildfires. Although the ...
in 2007 and the Cedar Fire in 2003. California defines a fire season in which fires are most likely to occur, usually between late July and late October (which are the driest months of the area). Signs posted in numerous spots of the county provide information on the level of threats from fires based on weather conditions.


Climate

Under the
Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, nota ...
system, the urban and suburban San Diego area straddles areas of
Mediterranean climate A Mediterranean climate (also called a dry summer temperate climate ''Cs'') is a temperate climate sub-type, generally characterized by warm, dry summers and mild, fairly wet winters; these weather conditions are typically experienced in the ...
(CSa) to the north and
semi-arid climate A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi ...
(BSh) to the south and east. As a result, it is often described as "arid Mediterranean" and "semi-arid steppe." Farther east, arid desert conditions prevail. Western San Diego's climate is characterized by warm, dry summers and mild winters with most of the annual precipitation falling between November and March. The city has mild, mostly dry weather, with an average of 201 days above and low rainfall ( annually). Summer temperatures are generally warm, with average highs of and lows of . Temperatures exceed only four days a year. Most rainfall occurs from November to April. Winter temperatures are mild, with average high temperatures of and lows of . The climate in the San Diego area, like much of California, often varies significantly over short geographical distances resulting in
microclimate A microclimate (or micro-climate) is a local set of atmospheric conditions that differ from those in the surrounding areas, often with a slight difference but sometimes with a substantial one. The term may refer to areas as small as a few squ ...
s. In San Diego's case this is mainly due to the city's topography (the Bay, and the numerous hills, mountains, and canyons). Frequently, particularly during the "May gray/ June gloom" period, a thick
marine layer A marine layer is an air mass that develops over the surface of a large body of water, such as an ocean or large lake, in the presence of a temperature inversion. The inversion itself is usually initiated by the cooling effect of the water on ...
will keep the air cool and damp within a few miles of the coast, but will yield to bright cloudless sunshine approximately inland. This happens every year in May and June. Even in the absence of June gloom, inland areas tend to experience much more significant temperature variations than coastal areas, where the ocean serves as a moderating influence. Thus, for example, downtown San Diego averages January lows of and August highs of . The city of El Cajon, just northeast of downtown San Diego, averages January lows of and August highs of . Julian, in the mountains, has an average January low of and August high of . Borrego Springs, in the Colorado Desert, has an average January low of and August high of . Rainfall along the coast averages about of precipitation annually, which occurs mainly during the cooler months of December through April. Though there are few wet days per month during the rainy period, rainfall can be heavy when it does occur. However, the rainfall is greater in the higher elevations of San Diego. Some of the higher areas of San Diego, such as
Palomar Mountain Palomar Mountain ( ; es, Monte Palomar ) is a mountain ridge in the Peninsular Ranges in northern San Diego County. It is famous as the location of the Palomar Observatory and Hale Telescope, and known for the Palomar Mountain State Park. His ...
and the Laguna Mountains, receive of rain per year, supporting lush forests similar to the
Sierra Nevada The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primar ...
and California Coast Range. The
Colorado Desert California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna. Geography and geology The Colorado D ...
portion of the county lies to the east of the mountains, which receives the least amount of precipitation; Borrego Springs, the largest population center in the desert, averages only , with a high evaporation rate.


Adjacent counties and municipalities


National protected areas

* Cabrillo National Monument *
Cleveland National Forest Cleveland National Forest encompasses 460,000 acres (), mostly of chaparral, with a few riparian areas. A warm dry mediterranean climate prevails over the forest. It is the southernmost U.S. National Forest of California. It is administered by ...
(part) *
San Diego National Wildlife Refuge Complex The San Diego National Wildlife Refuge Complex is a series of wildlife refuges established by the United States National Wildlife Service beginning in 1972. The complex incorporates five refuges in San Diego County and Orange County in California ...
, which includes **
San Diego National Wildlife Refuge San Diego National Wildlife Refuge is a National Wildlife Refuge in California. It is part of the San Diego National Wildlife Refuge Complex. A variety of habitats from coastal sage scrub and chaparral to oak woodland and freshwater marsh ...
**
San Diego Bay National Wildlife Refuge San Diego Bay National Wildlife Refuge is an urban refuge located on San Diego Bay in San Diego County, California. It is part of the San Diego National Wildlife Refuge Complex. It was dedicated in June 1999. The refuge, comprising of salt ma ...
**
Tijuana Slough National Wildlife Refuge Tijuana Slough National Wildlife Refuge is located in the most southwestern corner of the contiguous United States. As a National Wildlife Refuge, it is administered by the U.S. Fish and Wildlife Service. It was established in 1980. The refuge for ...
**
Seal Beach National Wildlife Refuge The Seal Beach National Wildlife Refuge is a wildlife refuge encompassing located in the California coastal community of Seal Beach. Although it is located in Orange County it is included as part of the San Diego National Wildlife Refuge Compl ...
(located in Orange County) There are seven official
wilderness area Wilderness or wildlands (usually in the plural), are natural environments on Earth that have not been significantly modified by human activity or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally re ...
s in San Diego County that are part of the
National Wilderness Preservation System The National Wilderness Preservation System (NWPS) of the United States protects federally managed wilderness areas designated for preservation in their natural condition. Activity on formally designated wilderness areas is coordinated by the Na ...
. Four of these are integral parts of Cleveland National Forest, whereas three are managed by the
Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's ...
. Some of these extend into neighboring counties (as indicated below): *
Otay Mountain Wilderness The Otay Mountain Wilderness is a U.S. Wilderness Area located in San Diego County, California, 12 miles east of the city of Otay Mesa and just north of the Mexican border. Some parts of the wilderness area rise quickly from sea level, reaching ...
(BLM) * Pine Creek Wilderness (Cleveland National Forest) *
Hauser Wilderness Hauser is a German-language surname. Notable people with the surname include: * Arnold George Hauser (1888–1966), American baseball player * Arnold Hauser (art historian) (1892–1978), Hungarian art historian * Bodo Hauser (1946–2004), Germ ...
(Cleveland National Forest) *
Carrizo Gorge Wilderness Carrizo Gorge is a valley in the Jacumba Mountains, in San Diego County, California San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the po ...
(BLM) *
Sawtooth Mountains Wilderness The Sawtooth Mountains Wilderness is a federal wilderness area of located in the Sawtooth Mountains in eastern San Diego County, California. It is located in the Colorado Desert, south of Borrego Springs, near Anza Borrego Desert State Park. ...
(BLM) *
Agua Tibia Wilderness Agua Tibia Wilderness (ATW) is a protected area in Riverside and San Diego counties, in the U.S. state of California. It is mostly within the Palomar Ranger District of the Cleveland National Forest. The area was originally protected as the Agua ...
(Cleveland National Forest) partly in Riverside County * San Mateo Canyon Wilderness (Cleveland National Forest) mostly in Riverside County


State parks and protected areas

* Anza-Borrego Desert State Park (part) * Torrey Pines State Reserve * Cuyamaca Rancho State Park * Palomar Mountain State Park *
San Pasqual Battlefield State Historic Park San Pasqual Battlefield State Historic Park honors the soldiers who fought in the 1846 Battle of San Pasqual, the bloodiest battle in California during the Mexican–American War. The battle was fought between United States troops under the co ...
* Old Town San Diego State Historic Park * Border Field State Park *
Tijuana River National Estuarine Research Reserve Tijuana River National Estuarine Research Reserve is a natural reserve in Imperial Beach, California and San Ysidro, San Diego. It encompasses the Tijuana River Estuary, located on the Mexico–United States border. It is divided into two part ...
* San Onofre State Beach * Moonlight State Beach * Carlsbad State Beach * South Carlsbad State Beach * Leucadia State Beach * San Elijo State Beach * Cardiff State Beach *
Torrey Pines State Beach Torrey Pines State Beach is a public beach located in the San Diego, California community of Torrey Pines, south of Del Mar and north of La Jolla. Coastal erosion from the adjacent Torrey Pines State Reserve makes for a picturesque landscape. I ...
* Silver Strand State Beach


Mountains

*
Cuyamaca Mountains The Cuyamaca Mountains (Kumeyaay: ''‘Ekwiiyemak''), locally the Cuyamacas, are a mountain range of the Peninsular Ranges System, in San Diego County, southern California. The mountain range runs roughly northwest to southeast. The Laguna Mounta ...
*
In-Ko-Pah Mountains The In-Ko-Pah Mountains are one of the Peninsular Ranges located near the U.S. border with Mexico in southern California, west of the Jacumba Mountains. The range, which lies in a north-south direction, is located just north of Interstate 8, and ...
*
Jacumba Mountains The Jacumba Mountains are a mountain range of the Peninsular Ranges system, located in eastern San Diego County, Southern California, near the U.S. border with Mexico. The mountain range lies in a northwest-southeasterly direction, east of the I ...
* Laguna Mountains *
Palomar Mountain Palomar Mountain ( ; es, Monte Palomar ) is a mountain ridge in the Peninsular Ranges in northern San Diego County. It is famous as the location of the Palomar Observatory and Hale Telescope, and known for the Palomar Mountain State Park. His ...
*
Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...
*
San Ysidro Mountains The San Ysidro Mountains are a mountain range in southern San Diego County, California and Baja California, Mexico. The mountains are a rugged coastal foothill range of the Peninsular Ranges system. Major peaks include the highest summit of the r ...
*
Santa Ana Mountains The Santa Ana Mountains are a short peninsular mountain range along the coast of Southern California in the United States. They extend for approximately southeast of the Los Angeles Basin largely along the border between Orange and Riverside ...
* Volcan Mountains There are 236 mountain summits and peaks in San Diego County including: * Black Mountain *
Cuyamaca Peak Cuyamaca Peak is a mountain peak of the Cuyamaca Mountains range, in San Diego County, Southern California. Geography At , its summit is the second highest point in San Diego County. Cuyamaca Peak is located roughly from the Pacific Ocean, wi ...
(second highest point in San Diego County) * Cowles Mountain (highest point in the city of San Diego) * Mount Helix * Hot Springs Mountain (highest point in San Diego County) *
Margarita Peak Margarita Peak is a prominent mountain in San Diego County. It is southwest of Murrieta Hot Springs and northwest of Fallbrook. Its summit is the 32nd most prominent peak in San Diego County. Margarita Peak is owned by the Fallbrook Land Cons ...
* Mount Soledad * Stonewall Mountain *
El Cajon Mountain El Cajon Mountain, commonly known as El Capitan or El cap, is a mountain in the Cuyamaca Mountains, and prominent natural landmark in the East County of San Diego. Geography The summit of El Cajon Mountain is at . The mountain is almost complete ...


Bays and lagoons

*
Buena Vista Lagoon Buena Vista Lagoon is a freshwater lagoon adjacent to the Pacific Ocean in the South Coast region of Southern California within North County, San Diego County. The lagoon covers 223 acres of wetland A wetland is a distinct ecosystem that is ...
*
Agua Hedionda Lagoon The Agua Hedionda Lagoon ("agua hedionda" means "fetid water" in Spanish) is a lagoon in Carlsbad, California, that is fed by the Agua Hedionda Creek. Stewardship of much of the lagoon is held by the Encina Power Station and its owner NRG Ene ...
*
Batiquitos Lagoon The Batiquitos Lagoon is a coastal wetland and estuary located between southern Carlsbad, California, Carlsbad and Encinitas, California, Encinitas, in the North County (San Diego area), North County region of San Diego County, California. The la ...
* San Elijo Lagoon * Los Peñasquitos Lagoon * Mission Bay *
San Diego Bay San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S.–Mexico border. The bay, which is long and wide, is the third largest of the three large, protected natural bays on California's of ...


Lakes

* Lake Cuyamaca *
Lake Hodges Lake Hodges is a lake and reservoir located within the city limits of San Diego, California. It is about north of Downtown San Diego, just north of the Rancho Bernardo community, and just south of the city's border with Escondido. When full, th ...
*Santee Lakes * Sweetwater Reservoir *
Upper Otay Reservoir Upper Otay Reservoir, also called Upper Otay Lake, is a 20-acre artificial lake in San Diego County, California. It was created in 1959 as a hatchery for the propagation and introduction of Largemouth bass, Florida Largemouth bass. The reservoir h ...
*
Lower Otay Reservoir Lower Otay Reservoir is a reservoir in San Diego County, Southern California. It is flanked by Otay Mountain to the southeast, the Jamul Mountains to the east, Otay Lakes Road and Upper Otay Reservoir to the north, and the city of Chula Vista to ...
*Lake Wohlford *
El Capitan Reservoir El Capitan Reservoir is a reservoir in central San Diego County, California. It is in the Cuyamaca Mountains, about northeast of the city of San Diego and two miles northwest of the town of Alpine. The reservoir is formed by El Capitan Dam o ...
*Sutherland Reservoir *
Lake Henshaw Lake Henshaw is a reservoir in San Diego County, California at the southeast base of Palomar Mountain, approximately northeast of San Diego, California and southeast of Los Angeles. The lake covers approximately and holds of water when full ( ...
* Lake Murray * San Vicente Reservoir *
Lake Jennings Lake Jennings is a water supply reservoir in San Diego County, California. It is located in Lakeside, Ca. Recreation People can have picnics at Lake Jennings. The campground at Lake Jennings Park has a variety of campsites available, includ ...
*
Barrett Dam Barrett Dam is a concrete arch-gravity dam in southern San Diego County, California in the United States, forming Barrett Lake on Cottonwood Creek. The dam is part of the city of San Diego's local water supply system. Overview and operations Ba ...
*Natural Rock Tanks *Little Laguna Lake *Big Laguna Lake *Big Lake *Twin Lakes *Jean Lake *Lost Lake *Swan Lake *
Lake Miramar Miramar Reservoir is a reservoir located in the Scripps Miramar Ranch community of San Diego, California. Owned, operated and maintained by the City of San Diego, the reservoir and its 165-foot tall earthen embankment dam were completed in 1960 a ...
*
Lake Poway Lake Poway is a dam and reservoir in Poway, California, United States. The dam is owned by the City of Poway and was constructed between 1970 and 1972 with the purpose of storing and supplying water, and providing recreational facilities to the ...
* Dixon Lake *Lindo Lake


Rivers

* San Diego River * San Luis Rey River *
San Dieguito River The San Dieguito River is a major river in Southern California, United States. Its headwaters rise on the southern slope of the Volcan Mountains in San Diego County and the river flows generally southwest for ,U.S. Geological Survey. National H ...
* Sweetwater River * Otay River *
Tijuana River , name_etymology = , image = Presa Tij 1.jpg , image_size = , image_caption = Dam on the Tijuana River in Mexico. , map = Tijuana River Basin.svg , map_size = 250 , map_caption ...
* Santa Margarita River


Environmental risks

More than 1,700 tons of
radioactive waste Radioactive waste is a type of hazardous waste that contains radioactive material. Radioactive waste is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, rare-earth mining, and nuclear weapon ...
are stored at
San Onofre Nuclear Generating Station The San Onofre Nuclear Generating Station (SONGS) is a permanently closed nuclear power plant located south of San Clemente, California, on the Pacific coast, in Nuclear Regulatory Commission Region IV. The plant was shut down in 2013 after re ...
, which sits in an area where there is a record of past
tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...
s.


Demographics

Since at least 2014, San Diego County is the fifth most populous county in the United States. In 2000, only about 3% of San Diego County residents left the county for work while 40,000 people commuted into the metropolitan area.


2020 census

''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.''


Racial and Ethnic Composition since 1960


Race

The
2010 United States Census The United States census of 2010 was the twenty-third United States national census. National Census Day, the reference day used for the census, was April 1, 2010. The census was taken via mail-in citizen self-reporting, with enumerators serving ...
reported that San Diego County had a population of 3,095,313. The racial makeup of San Diego County was 1,981,442 (64.0%)
White White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White ...
, 158,213 (5.1%)
African American African Americans (also referred to as Black Americans and Afro-Americans) are an ethnic group consisting of Americans with partial or total ancestry from sub-Saharan Africa. The term "African American" generally denotes descendants of ens ...
, 26,340 (0.9%) Native American, 336,091 (10.9%) Asian (4.7% Filipino, 1.6% Vietnamese, 1.4% Chinese, 3.2% Other Asian), 15,337 (0.5%)
Pacific Islander Pacific Islanders, Pasifika, Pasefika, or rarely Pacificers are the peoples of the Pacific Islands. As an ethnic/ racial term, it is used to describe the original peoples—inhabitants and diasporas—of any of the three major subregions of O ...
, 419,465 (13.6%) from other races, and 158,425 (5.0%) from two or more races.
Hispanic The term ''Hispanic'' ( es, hispano) refers to people, cultures, or countries related to Spain, the Spanish language, or Hispanidad. The term commonly applies to countries with a cultural and historical link to Spain and to viceroyalties for ...
or Latino of any race were 991,348 people (32.0%). Including those of mixed race, the total number of residents with Asian ancestry was 407,984. As of 2009, the racial makeup of the county was 79.4%
White American White Americans are Americans who identify as and are perceived to be white people. This group constitutes the majority of the people in the United States. As of the 2020 Census, 61.6%, or 204,277,273 people, were white alone. This represented ...
, 5.6%
Black Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and grey. It is often used symbolically or figuratively to represent darkness. Black and white ha ...
or
African American African Americans (also referred to as Black Americans and Afro-Americans) are an ethnic group consisting of Americans with partial or total ancestry from sub-Saharan Africa. The term "African American" generally denotes descendants of ens ...
, 1% Native American, 10.4% Asian, 0.5%
Pacific Islander Pacific Islanders, Pasifika, Pasefika, or rarely Pacificers are the peoples of the Pacific Islands. As an ethnic/ racial term, it is used to describe the original peoples—inhabitants and diasporas—of any of the three major subregions of O ...
, 10.3% from other races, and 3.6% from two or more races. 31.3% of the population were
Hispanic The term ''Hispanic'' ( es, hispano) refers to people, cultures, or countries related to Spain, the Spanish language, or Hispanidad. The term commonly applies to countries with a cultural and historical link to Spain and to viceroyalties for ...
or Latino of any race. 67.0% spoke only English at home; 21.9% spoke Spanish, 3.1%
Tagalog Tagalog may refer to: Language * Tagalog language, a language spoken in the Philippines ** Old Tagalog, an archaic form of the language ** Batangas Tagalog, a dialect of the language * Tagalog script, the writing system historically used for Taga ...
and 1.2% Vietnamese.


Other demographics

As of 2018 Census Bureau estimates, there were 3,343,364 people, 1,067,846 households, and 663,449 families residing in the county. The population density was . There were 1,142,245 housing units at an average density of . In 2000 there were 994,677 households, out of which 33.9% had children under the age of 18 living with them, 50.7% were married couples living together, 11.6% had a female householder with no husband present, and 33.3% were non-families. 24.2% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.29. As of 2000, in the county the population was spread out, with 25.7% under the age of 18, 11.30% from 18 to 24, 32.0% from 25 to 44, 19.8% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 101.2 males. For every 100 females age 18 and over, there were 99.7 males. In 2012, it was estimated that there were 198,000 unauthorized immigrants; the origin of the plurality of them is
Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...
. In 2018, the median household income was $70,824; most people spend more than 30% of their income on housing costs. In August of that year, the median home price was $583,000; this is lower than the median home price in Los Angeles, and Orange counties.


Income

According to the 2000 Census, the median income for a household in the county was $47,067, and the median income for a family was $53,438. Males had a median income of $36,952 versus $30,356 for females. The per capita income for the county was $22,926. About 8.9% of families and 12.4% of the population were below the poverty line, including 16.5% of those under age 18 and 6.8% of those age 65 or over. Much of the county's high-income residents are concentrated in the northern part of the city of San Diego. The San Diego metropolitan area has two places with both a population of over 50,000 and a per capita income of over $40,000: Carlsbad and Encinitas. The county's largest continuous high-income urban area is a triangle from a first point on the northern edge of Carlsbad, a second point southeast of Escondido, and a third point on the southern edge of La Jolla. It contains all or most of the cities of Carlsbad, Encinitas, Solana Beach, Del Mar, and Poway in addition to a substantial portion of northern San Diego.U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Tables B01003 and B19025
U.S. Census website
Retrieved October 26, 2013.


Homelessness

According to a Point-In-Time count taken for the San Diego Regional Task Force on the Homeless, there were 8,576 homeless individuals on January 6, 2018, a 6% decrease from 2017. 3,586 were sheltered, and 4,990 were not. 4,912 (75.3%) were in the city of San Diego. North County Inland had 1,153 (13.4%), North County Coastal with 822 homeless (9.6%), 602 (7%) were found in South County, and 1,087 (12.7%) in East County.


Religion

According to the
Pew Research Center The Pew Research Center is a nonpartisan American think tank (referring to itself as a "fact tank") based in Washington, D.C. It provides information on social issues, public opinion, and demographic trends shaping the United States and th ...
, 68% of adults in the county are
Christian Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
, of whom 32% are
Catholic The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide . It is among the world's oldest and largest international institutions, and has played a ...
. 27% were unaffiliated, and 5% adhered to a Non-Christian faith. According to the
University of Southern California , mottoeng = "Let whoever earns the palm bear it" , religious_affiliation = Nonsectarian—historically Methodist , established = , accreditation = WSCUC , type = Private research university , academic_affiliations = , endowment = $8.1 ...
, in 2010, the largest faith in the county was Catholicism, followed by Nondenominational Christians, and
Mormons Mormons are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement started by Joseph Smith in upstate New York during the 1820s. After Smith's death in 1844, the movement split into sever ...
. In 2014, the county had 978 religious organizations, the seventh most out of all US counties.


Immigration Data

In 2014 according to
Pew Research Center The Pew Research Center is a nonpartisan American think tank (referring to itself as a "fact tank") based in Washington, D.C. It provides information on social issues, public opinion, and demographic trends shaping the United States and th ...
, there are about 170,000 illegal aliens living in the region. San Diego has been a destination for
trafficked ''Trafficked'' is a 2017 American thriller drama film directed by Will Wallace and starring Ashley Judd, Sean Patrick Flanery and Anne Archer. Plot In California, Sara is eighteen and has to leave her foster home; she is offered training to be a ...
minors from Mexico and the Philippines. In 2018, the
United States Border Patrol The United States Border Patrol (USBP) is a federal law enforcement agency under the United States' Customs and Border Protection and is responsible for securing the borders of the United States. According to its web site in 2022, its mission ...
caught an average of over a hundred individuals crossing the border illegally each day.


Economy

San Diego County and Imperial County are part of the Southern Border Region, one of nine such regions. As a regional economy, the Southern Border Region is the smallest but most economically diverse region in the state. However, the two counties maintain weak relations and have little in common aside from their common border. The region has a high cost of living. This includes the highest cost of water in the United States. , San Diego County is within the top ten highest cost of rent in the United States; this has led to people moving out of the county.


Agriculture

San Diego County's
agriculture Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people ...
industry was worth $1.85 billion in 2013, and is one of the top five egg producing counties in the United States. In 2013, San Diego County also had the most small farms of any county in the United States, and had the 19th largest agricultural economy of any county in the United States. According to the San Diego Farm Bureau, San Diego County is the United States' leading producer of avocados and nursery crops. Until the early 20th century, San Diego County had a thriving
wine industry Wine is an alcoholic drink typically made from fermented grapes. Yeast consumes the sugar in the grapes and converts it to ethanol and carbon dioxide, releasing heat in the process. Different varieties of grapes and strains of yeasts are ...
; however the 1916 Charles Hatfield flood was the beginning of the end of the industry which included the destruction of the Daneri winery in
Otay Valley Otay may refer to: Locations *Otay Centenario Otay Centenario is a borough of the municipality of Tijuana in Baja California, Mexico. It is the result of a merger between the former boroughs of Mesa de Otay and Centenario which took place on Jan ...
. , there are roughly one hundred vineyards and wineries in San Diego County. By the 20192020 statistical survey, California Department of Food & Agriculture (cdfa) found that the nursery trade dominated the county's agriculture by dollar value. Second place went to
avocado The avocado (''Persea americana'') is a medium-sized, evergreen tree in the laurel family ( Lauraceae). It is native to the Americas and was first domesticated by Mesoamerican tribes more than 5,000 years ago. Then as now it was prized for ...
production.


Breweries

The county has been called "the Craft Beer Capital of America". Brewing has been one of the fastest-growing business sectors with local breweries ranking among the 50 largest craft brewers in the United States and breweries that are consistently rated among the top breweries in the world.


Cannabis

Commercial operations to grow, test, or sell cannabis are not allowed in the unincorporated areas of the county. Companies must be licensed by the local agency to operate and each city or county may authorize none or only some of these activities. Local governments may not prohibit adults, who are in compliance with state laws, from growing, using, or transporting marijuana for personal use.


Tourism

Tourism plays a large part in the economics of the San Diego metropolitan area. Tourists are drawn to the region for a well rounded experience, everything from shopping to surfing as well as its mild climate. Its numerous tourist destinations include
Westfield UTC Westfield UTC (formerly known as University Towne Centre) is an open-air shopping mall located in the University City community of San Diego, California built in 1977. It lies just east of La Jolla, near the University of California, San Diego c ...
,
Seaport Village Seaport Village is a waterfront shopping and dining complex adjacent to San Diego Bay in downtown San Diego, California. It is located at 849 West Harbor Drive, at the intersection of Harbor Drive and Kettner. It houses more than 70 shops, ga ...
, Westfield Mission Valley and Fashion Valley Mall for shopping. SeaWorld San Diego and
Legoland California Legoland California Resort is a theme park, miniature park, and aquarium located in Carlsbad, California, based on the Lego toy brand. Opening on March 20, 1999, it was the third Legoland park to open and the first outside of Europe. The park ...
as amusement parks. Golf courses such as Torrey Pines Golf Course and Balboa Park Golf Course. Museums such as the
San Diego Museum of Man The Museum of Us (formerly known as the San Diego Museum of Man) is a museum of anthropology located in Balboa Park, San Diego, California and housed in the historic landmark buildings of the California Quadrangle. History The museum traces ...
, San Diego Museum of Art, Reuben H. Fleet Science Center, San Diego Natural History Museum,
USS Midway Museum The USS ''Midway'' Museum is a historical naval aircraft carrier museum located in downtown San Diego, California at Navy Pier. The museum consists of the aircraft carrier . The ship houses an extensive collection of aircraft, many of which we ...
, and the San Diego Air and Space Museum. Historical places such as the
Gaslamp Quarter The Gaslamp Quarter is a 16½-block neighborhood in the downtown area of San Diego, California. It extends from Broadway to Harbor Drive, and from 4th to 6th Avenue. Listed as a historic district on the National Register of Historic Places as G ...
, Balboa Park and Old Town San Diego State Historic Park. Wildlife refuges, zoos, and aquariums such as the Birch Aquarium at Scripps, San Diego Zoo's Safari Park, San Diego Zoo and San Diego-La Jolla Underwater Park. Outdoor destinations include the
Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...
for
hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...
,
biking Cycling, also, when on a two-wheeled bicycle, called bicycling or biking, is the use of cycles for transport, recreation, exercise or sport. People engaged in cycling are referred to as "cyclists", "bicyclists", or "bikers". Apart from two ...
, mountainboarding and trail riding.
Surfing Surfing is a surface water sport in which an individual, a surfer (or two in tandem surfing), uses a board to ride on the forward section, or face, of a moving wave of water, which usually carries the surfer towards the shore. Waves suitable ...
locations include Swami's, Stone Steps Beach,
Torrey Pines State Beach Torrey Pines State Beach is a public beach located in the San Diego, California community of Torrey Pines, south of Del Mar and north of La Jolla. Coastal erosion from the adjacent Torrey Pines State Reserve makes for a picturesque landscape. I ...
, Cardiff State Beach, San Onofre State Beach and the southern portion of
Black's Beach Black's Beach is a secluded section of beach beneath the bluffs of Torrey Pines on the Pacific Ocean in La Jolla, San Diego, California, United States. It is officially part of Torrey Pines State Beach. The northern portion of Black's Beach is o ...
. The region is host to the second largest cruise ship industry in California which generates an estimated $2 million annually from purchases of food, fuel, supplies, and maintenance services. In 2008 the Port of San Diego hosted 252 ship calls and more than 800,000 passengers.


Culture

The culture of San Diego is influenced heavily by
American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...
and Mexican
culture Culture () is an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the knowledge, beliefs, arts, laws, customs, capabilities, and habits of the individuals in these groups ...
s due to its position as a border town, its large
Hispanic The term ''Hispanic'' ( es, hispano) refers to people, cultures, or countries related to Spain, the Spanish language, or Hispanidad. The term commonly applies to countries with a cultural and historical link to Spain and to viceroyalties for ...
population, and its history as part of Spanish America and
Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...
. The area's longtime association with the U.S. military also contributes to its culture. Present-day culture includes many historical and tourist attractions, a thriving musical and theatrical scene, numerous notable special events, a varied cuisine, and a reputation as one of America's premier centers of
craft brewing Craft beer is a beer that has been made by craft breweries. They produce smaller amounts of beer, typically less than large breweries, and are often independently owned. Such breweries are generally perceived and marketed as having an emphasis o ...
.


Sites of interest

* Mount Laguna Observatory, owned and primarily operated by San Diego State University *
Palomar Observatory Palomar Observatory is an astronomical research observatory in San Diego County, California, United States, in the Palomar Mountain Range. It is owned and operated by the California Institute of Technology (Caltech). Research time at the observat ...
, owned and primarily operated by the California Institute of Technology *The Ramona Valley wine-producing region, located northeast of the city of San Diego * San Diego Zoo Safari Park, formerly known as the San Diego Wild Animal Park, north of the San Diego Zoo and east of Escondido * Sea World of San Diego, on Mission Bay. * Mission Bay Recreation Area, including Fiesta Island, a sheltered bay popular for water sports, also known for the annual
Over the line Over-the-line is a bat-and-ball sport, a game related to baseball and softball. Like those games, it involves a batter, pitcher, and fielders. Because a game requires only three people per team, it is considerably easier to get a good informal gam ...
tournament. * Mission San Diego de Alcala, the first of California's 21 Spanish missions. It is an operating Roman Catholic parish and also is open for historical interest tours during the week. It is located near the interchange of Interstates 8 and 15. * Mission San Luis Rey, founded on June 13, 1798, by Padre Fermín Lasuén. It is the 18th of the Spanish missions established in California. It is an operating Roman Catholic parish and is open every day for historical interest tours. It is located near Route 76 in the Oceanside area. * Balboa Park, with numerous museums and other cultural locations, just north of
Downtown San Diego Downtown San Diego is the city center of San Diego, California, the eighth largest city in the United States. In 2010, the Centre City area had a population of more than 28,000. Downtown San Diego serves as the cultural and financial center and ...
. * San Diego Zoo, located in Balboa Park * Presidio Park, located on a bluff directly above Old Town, a city historic park on the site of the
San Diego Presidio El Presidio Real de San Diego (Royal Presidio of San Diego) is a historic fort in San Diego, California. It was established on May 14, 1769, by Gaspar de Portolá, leader of the first European land exploration of Alta California—at that time a ...
, the first European settlement in California. *
San Diego Bay San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S.–Mexico border. The bay, which is long and wide, is the third largest of the three large, protected natural bays on California's of ...
contains the
aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a ...
USS ''Midway'' now used as a memorial ship and as a floating museum, and the eight floating museum ships of the San Diego Maritime Museum. Harbor cruises, sailing, and sport fishing are also available. *
Legoland California Legoland California Resort is a theme park, miniature park, and aquarium located in Carlsbad, California, based on the Lego toy brand. Opening on March 20, 1999, it was the third Legoland park to open and the first outside of Europe. The park ...
, a
Lego Lego ( , ; stylized as LEGO) is a line of plastic construction toys that are manufactured by The Lego Group, a privately held company based in Billund, Denmark. The company's flagship product, Lego, consists of variously colored interlocki ...
theme park in Carlsbad. *
Alta Vista Gardens The Alta Vista Botanical Gardens is a botanical garden located in Vista, California, in the United States. The mission of the gardens is to "bring together people, nature and art". History "Plans for a botanical garden in Vista go back more t ...
is a
Botanical Garden A botanical garden or botanic gardenThe terms ''botanic'' and ''botanical'' and ''garden'' or ''gardens'' are used more-or-less interchangeably, although the word ''botanic'' is generally reserved for the earlier, more traditional gardens, an ...
in Vista dedicated to bringing together 'People, Nature & Art'. *
Mount Ecclesia Mount Ecclesia (dedicated on October 28, 1911) is the location of the international headquarters of the fraternal and service organization The Rosicrucian Fellowship (TRF), located on grounds in Oceanside, California. It is also the location of ...
is a
historic district A historic district or heritage district is a section of a city which contains older buildings considered valuable for historical or architectural reasons. In some countries or jurisdictions, historic districts receive legal protection from cer ...
noted for its singular architecture and the preservation of nature grounds and gardens, offering a unique meditative walking experience. It is located about a mile east of Interstate 5 in the Oceanside area. * San Dieguito County Park


Sports

The most popular sports team in the San Diego metropolitan area is
Major League Baseball Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (A ...
(MLB)'s San Diego Padres. The college sports teams of the San Diego State Aztecs are also locally popular.


Major professional team


Other highest-level professional teams


Minor league professional teams


College teams

The San Diego State Aztecs ( MW), the San Diego Toreros ( WCC), and the UC San Diego Tritons ( BWC) are
NCAA Division I NCAA Division I (D-I) is the highest level of intercollegiate athletics sanctioned by the National Collegiate Athletic Association (NCAA) in the United States, which accepts players globally. D-I schools include the major collegiate athleti ...
teams. The Cal State San Marcos Cougars ( CCAA) and
Point Loma Nazarene Sea Lions The Point Loma Sea Lions (officially Point Loma Nazarene Sea Lions or PLNU Sea Lions) are the athletic teams that represent Point Loma Nazarene University, located in San Diego, California, in intercollegiate sports as a member of the Division ...
( PacWest) are members of
NCAA Division II NCAA Division II (D-II) is an intermediate-level division of competition in the National Collegiate Athletic Association (NCAA). It offers an alternative to both the larger and better-funded Division I and to the scholarship-free environmen ...
, while the San Diego Christian Hawks ( GSAC) and Saint Katherine Firebirds ( CalPac) are a member of the NAIA.


Government

The Government of San Diego County is defined and authorized under the
California Constitution The Constitution of California ( es, Constitución de California) is the primary organizing law for the U.S. state of California, describing the duties, powers, structures and functions of the government of California. California's original c ...
, California law, and the Charter of the County of San Diego. Much of the Government of California is in practice the responsibility of county governments such as the Government of San Diego County. The County government provides countywide services such as elections and voter registration, law enforcement, jails, vital records, property records, tax collection, public health, and social services. In addition the County serves as the local government for all unincorporated areas. Some chartered cities such as
San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
and
Chula Vista Chula Vista (; ) is the second-largest city in the San Diego metropolitan area, the seventh largest city in Southern California, the fifteenth largest city in the state of California, and the 78th-largest city in the United States. The popu ...
provide municipal services such as police, public safety, libraries, parks and recreation, and zoning. Other cities such as Del Mar and Vista arrange to have the County provide some or all of these services on a contract basis. The county government is composed of the elected five-member
Board of Supervisors A board of supervisors is a governmental body that oversees the operation of county government in the U.S. states of Arizona, California, Iowa, Mississippi, Virginia, and Wisconsin, as well as 16 counties in New York. There are equivalent agen ...
, several other elected offices and officers and numerous county departments and entities under the supervision of the Chief Administrative Officer such as the Probation Department. In addition, several entities of the government of California have jurisdiction conterminous with San Diego County, such as the San Diego Superior Court. Under its foundational Charter, the five-member elected San Diego County Board of Supervisors is the county legislature. The board operates in a legislative, executive, and quasi-judicial capacity. As a legislative authority, it can pass ordinances for the unincorporated areas (ordinances that affect the whole county, like posting of restaurant ratings, must be ratified by the individual city). As an executive body, it can tell the county departments what to do, and how to do it. As a quasi-judicial body, the Board is the final venue of appeal in the local planning process. As of January 2021, the members of the San Diego County Board of Supervisors are: For several decades, ending in 2013, all five supervisors were Republican,
white White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White ...
, graduates of San Diego State University, and had been in office since 1995 or earlier. The Board was criticized for this homogeneity, which was made possible because supervisors draw their own district lines and are not subject to term limits. (In 2010 voters put term limits in place, but they only apply going forward, so that each incumbent supervisor can serve an additional two terms before being termed out.) That pattern was broken in 2013 when Slater-Price retired; she was replaced by Democrat Dave Roberts, who won election to the seat in November 2012 and was inaugurated in January 2013. The San Diego County Code is the codified law of San Diego County in the form of
ordinance Ordinance may refer to: Law * Ordinance (Belgium), a law adopted by the Brussels Parliament or the Common Community Commission * Ordinance (India), a temporary law promulgated by the President of India on recommendation of the Union Cabinet * ...
s passed by the Board of Supervisors. The Administrative Code establishes the powers and duties of all officers and the procedures and rules of operation of all departments. The county motto is "The noblest motive is the public good." County government offices are housed in the historic County Administration Center Building, constructed in 1935–1938 with funding from the
Works Progress Administration The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was an American New Deal agency that employed millions of jobseekers (mostly men who were not formally educated) to carry out public works projects, i ...
.


Politics


Voting

San Diego County had historically been a Republican stronghold. The Republican presidential nominee carried the county in every presidential election from 1948 through 2004, except in 1992 when
Bill Clinton William Jefferson Clinton (né Blythe III; born August 19, 1946) is an American politician who served as the 42nd president of the United States from 1993 to 2001. He previously served as governor of Arkansas from 1979 to 1981 and again ...
won a plurality. In 2008,
Barack Obama Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party (United States), Democratic Party, Obama was the first Af ...
became the first Democratic presidential candidate to win a majority of votes in San Diego County since World War II; he won a majority of county votes again in 2012. In 2020, the county voted in favor of the Democratic presidential nominee Joe Biden by 22.8%, the largest margin for a Democrat since 1936. The city of San Diego itself is more Democratic than the county's average and has voted for Democrats in each presidential election since 1992. Various cities within the county are swing areas that have split their votes in elections since 2000. Republican strength is concentrated in North County, East County and the eastern backlands. Coronado has also traditionally been a Republican stronghold. One unique feature of the political scene is the use of Golden Hall, a convention facility next to San Diego's City Hall, as "Election Central." The County Registrar of Voters rents the hall to distribute election results. Supporters and political observers gather to watch the results come in; supporters of the various candidates parade around the hall, carrying signs and chanting; candidates give their victory and concession speeches and host parties for campaign volunteers and donors at the site; and television stations broadcast live from the floor of the convention center. The atmosphere at Election Central on the evening of election day has been compared to the voting portion of a political party national convention. On November 4, 2008, San Diego County voted 53.71% for Proposition 8 which amended the California Constitution to ban same-sex marriages, thus restoring Proposition 22 which was overturned by a ruling from the
California Supreme Court The Supreme Court of California is the highest and final court of appeals in the courts of the U.S. state of California. It is headquartered in San Francisco at the Earl Warren Building, but it regularly holds sessions in Los Angeles and Sac ...
. However the city of San Diego, along with the North County coastal cities of Del Mar, Encinitas, and Solana Beach, voted against Proposition 8. La Mesa was a virtual tie for Prop 8 support, while Carlsbad supported the referendum by only a 2% margin.


Federal and state representation

In the United States House of Representatives, U.S. House of Representatives, San Diego County is split between five congressional districts: * * * * and * . In the California State Assembly, San Diego County is split between seven legislative districts: * , * , * , * , * , * , and * . In the California State Senate, San Diego County is split between four legislative districts: * , * , * , and * .


Crime

The following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense.


Cities by population and crime rates


Education

San Diego County contains three public state universities: University of California, San Diego; San Diego State University; and California State University, San Marcos. Major private universities in the county include University of San Diego (USD), Point Loma Nazarene University (PLNU), Alliant International University (AIU), and National University (California), National University. It also includes three law schools, USD School of Law, California Western School of Law, and Thomas Jefferson School of Law. Within the county there are 24 public elementary school districts, 6 high school districts, and 12 unified school districts. There are also 5 community college districts. There are two separate public library systems in San Diego County: the San Diego Public Library serving the city of San Diego, and the San Diego County Library serving all other areas of the county. In 2010 the county library had 33 branches and two bookmobiles; circulated over 10.7 million books, CDs, DVDs, and other material formats; recorded 5.7 million visits to library branches; and hosted 21,132 free programs and events. The San Diego County Library is one of the 25 busiest libraries in the nation as measured by materials circulated.


Community College Districts

*Grossmont-Cuyamaca Community College District *Miracosta Community College District, MiraCosta Community College District *Palomar Community College District *San Diego Community College District *Southwestern College (California), Southwestern Community College District


K-12 schools

;School districts: K-12 unified: * Borrego Springs Unified School District * Bonsall Unified School District * Carlsbad Unified School District * Coronado Unified School District * Mountain Empire Unified School District * Oceanside Unified School District * Poway Unified School District * Ramona City Unified School District * San Diego City Unified School District * San Marcos Unified School District * Vista Unified School District * Valley Center-Pauma Unified School District * Warner Unified School District Secondary: * Escondido Union High School District * Fallbrook Union High School District * Grossmont Union High School District * Julian Union High School District * San Dieguito Union High School District * Sweetwater Union High School District Elementary: * Alpine Union Elementary School District * Cajon Valley Union Elementary School District * Cardiff Elementary School District * Chula Vista Elementary School District * Dehesa Elementary School District * Del Mar Union Elementary School District * Encinitas Union Elementary School District * Escondido Union Elementary School District * Fallbrook Union Elementary School District * Jamul-Dulzura Union Elementary School District * Julian Union Elementary School District * La Mesa-Spring Valley School District * Lakeside Union Elementary School District * Lemon Grove Elementary School District * National Elementary School District * Rancho Santa Fe Elementary School District * San Pasqual Union Elementary School District * San Ysidro Elementary School District * Santee School District * Solana Beach Elementary School District * South Bay Union School District * Spencer Valley Elementary School District * Vallecitos Elementary School District


Military

San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
is the headquarters of the U.S. Navy's Eleventh Naval District and is the Navy's principal location for West Coast and Pacific Ocean operations.
Naval Base San Diego Naval Base San Diego, also known as 32nd Street Naval Station, is the second largest surface ship base of the United States Navy and is located in San Diego, California. Naval Base San Diego is the principal homeport of the Pacific Fleet, con ...
,
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
is principal home to the Pacific Fleet (although the headquarters is located in Pearl Harbor). NAS North Island is located on the north side of Coronado, California, Coronado, and is home to Headquarters for Naval Air Forces and Naval Air Force Pacific, the bulk of the Pacific Fleet's helicopter squadrons, and part of the West Coast
aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a ...
fleet. The Naval Special Warfare Center is the primary training center for United States Navy SEALs, SEALs, and is also located on Coronado. The area contains five major naval bases and the U.S. Marines base Camp Pendleton. Marine Corps Base Camp Pendleton is the major West Coast of the United States, West Coast base of the United States Marine Corps and serves as its prime amphibious training base. It is located on the Southern California coast, bordered by Oceanside to the south, San Clemente to the north, and Fallbrook, California, Fallbrook to the east.


U.S. Navy

*
Naval Base San Diego Naval Base San Diego, also known as 32nd Street Naval Station, is the second largest surface ship base of the United States Navy and is located in San Diego, California. Naval Base San Diego is the principal homeport of the Pacific Fleet, con ...
, also known as 32nd Street Naval Station *Naval Amphibious Base Coronado *
Naval Air Station North Island Naval Air Station North Island or NAS North Island , at the north end of the Coronado peninsula on San Diego Bay in San Diego, California, is part of the largest aerospace-industrial complex in the United States Navy – Naval Base Coronado ...
*Naval Base Point Loma, which includes the Submarine Base and the Fleet Antisubmarine Warfare Training Center *Space and Naval Warfare Systems Command (SPAWAR) *Naval Medical Center San Diego, also known as Bob Wilson Naval Hospital and Balboa Naval Hospital


U.S. Marine Corps

* Marine Corps Base Camp Pendleton *
Marine Corps Air Station Miramar Marine Corps Air Station Miramar (MCAS Miramar) , formerly Naval Auxiliary Air Station (NAAS) Miramar and Naval Air Station (NAS) Miramar, is a United States Marine Corps installation that is home to the 3rd Marine Aircraft Wing, which is the av ...
*Marine Corps Recruit Depot San Diego


U.S. Coast Guard

* Coast Guard Air Station San Diego


U.S. Air Force

*San Diego Air National Guard Station, which is home to the 147th Combat Communications Squadron.


Media

San Diego County is primarily served by media in San Diego, including TV and radio stations based in the city.


Newspapers

San Diego County is served by many newspapers. The major regional paper is ''The San Diego Union-Tribune'', also known as ''U-T San Diego'' or just "The U-T" by locals, is ranked 23rd in the country (by daily circulation) as of March 2013. The ''Union-Tribune'' serves both San Diego County and neighboring Imperial County. The former ''North County Times'', based in Escondido and serving portions of Riverside County and San Diego North County, California, North County, was purchased by the Union-Tribune in 2012 and closed down. For about a year after absorbing the North County Times the Union-Tribune published a North County edition, but the regional edition was later abandoned. The ''Los Angeles Times'' is also delivered in portions of the county. Many of the area's cities, towns and neighborhoods have their own local newspapers; the ''Union Tribune'' bought eight local weeklies in 2013 and is continuing to publish them as independent local newspapers. The ''San Diego Daily Transcript'' reports business and legal news. Privately published papers like the ''Military Press Newspaper'' and the ''Navy Dispatch'' serve the military community both on and off base.


Other media

County Television Network is a public-access television cable channel, offering a "hometown blend of C-SPAN, the Lifetime, History, Travel, and Discovery channels" for the county, and funded by fees paid by cable companies.


Transportation


Major highways

* Interstate 5 in California, Interstate 5 * Interstate 8 in California, Interstate 8 * Interstate 15 in California, Interstate 15 * Interstate 805 * California State Route 11, State Route 11 * California State Route 15, State Route 15 * California State Route 52, State Route 52 * California State Route 54, State Route 54 * California State Route 56, State Route 56 * California State Route 67, State Route 67 * California State Route 75, State Route 75 * California State Route 76, State Route 76 * California State Route 78, State Route 78 * California State Route 79, State Route 79 * California State Route 94, State Route 94 * California State Route 125, State Route 125 * California State Route 163, State Route 163 * California State Route 188, State Route 188 * California State Route 282, State Route 282 * California State Route 905, State Route 905


Border crossings to Mexico

* San Ysidro Port of Entry * Otay Mesa Port of Entry *Otay Mesa East Port of Entry (projected opening 2024) * Tecate Port of Entry


Railroads

* Amtrak (Pacific Surfliner) * Metrolink (California), Metrolink * Coaster (commuter rail), The Coaster * San Diego and Arizona Eastern Railway * San Diego and Imperial Valley Railroad


Light rail and local transit

* San Diego Trolley * San Diego Metropolitan Transit System, San Diego Metropolitan Transit System (SDMTS/MTS) * Sprinter (San Diego County), Sprinter * North County Transit District, North County Transit District (NCTD)


The Port of San Diego

* Embarcadero (San Diego)


Airports


City of San Diego

* San Diego International Airport (SAN) a.k.a. Lindbergh Field * Montgomery-Gibbs Executive Airport (MYF) *Brown Field Municipal Airport (SDM) (formerly East Field, NAAS Otay Mesa, and NAAS Brown Field)


Carlsbad

* McClellan-Palomar Airport (CRQ) a.k.a. Palomar Airport or Carlsbad Airport


El Cajon

* Gillespie Field (SEE)


Oceanside

* Oceanside Municipal Airport (K0KB)


Unincorporated San Diego County

* Agua Caliente Airport (L54) * Borrego Valley Airport (L08) * Fallbrook Community Airpark (L18) *Jacumba Airport (L78) *Ocotillo Airport (L90) * Ramona Airport (RNM)


Communities


Cities


Former city


Census-designated places

* Alpine, California, Alpine * Bonita, California, Bonita * Bonsall, California, Bonsall * Borrego Springs, California, Borrego Springs * Bostonia, California, Bostonia * Boulevard, California, Boulevard * Campo, California, Campo * Camp Pendleton Mainside, California (CDP), Camp Pendleton Mainside * Camp Pendleton South, California, Camp Pendleton South * Casa de Oro-Mount Helix, California, Casa de Oro-Mount Helix * Crest, California, Crest * Del Dios * Descanso, California, Descanso * Elfin Forest, California, Elfin Forest * Eucalyptus Hills, California, Eucalyptus Hills * Fairbanks Ranch, California, Fairbanks Ranch * Fallbrook, California, Fallbrook * Granite Hills, California, Granite Hills * Harbison Canyon, California, Harbison Canyon * Harmony Grove * Hidden Meadows, California, Hidden Meadows * Jacumba Hot Springs, California, Jacumba Hot Springs * Jamul, California, Jamul * Julian, California, Julian * Lake San Marcos, California, Lake San Marcos * Lakeside, California, Lakeside * La Presa, California, La Presa * Mount Laguna, California, Mount Laguna * Oak Grove, San Diego County, California, Oak Grove * Pala, California, Pala * Pine Valley, California, Pine Valley * Potrero, California, Potrero * Rainbow, California, Rainbow * Ramona, California, Ramona * Rancho San Diego, California, Rancho San Diego * Rancho Santa Fe, California, Rancho Santa Fe * San Diego Country Estates, California, San Diego Country Estates * Spring Valley, San Diego County, California, Spring Valley * Valley Center, California, Valley Center * Winter Gardens, California, Winter Gardens


Unincorporated communities

* 4S Ranch, California, 4S Ranch * Agua Caliente County Park, Agua Caliente * Ballena, California, Ballena * Banner, California, Banner * Casa de Oro, California, Casa de Oro * Dehesa, California, Dehesa * De Luz, California, De Luz * De Luz Heights, California, De Luz Heights * Dulzura, California, Dulzura * East Otay Mesa, California, East Otay Mesa * Flinn Springs, California, Flinn Springs * Foster, San Diego County, California, Foster * Guatay, California, Guatay * Jesmond Dene, California, Jesmond Dene * Jofegan, California, Jofegan * Kentwood-In-The-Pines, California, Kentwood-In-The-Pines * Lincoln Acres, California, Lincoln Acres * Manzanita, San Diego County, California, Manzanita * Ocotillo Wells, California, Ocotillo Wells * Pala Mesa, California, Pala Mesa * Palomar Mountain, California, Palomar Mountain * Pauma Valley, California, Pauma Valley * Pine Hills, San Diego County, California, Pine Hills * Ranchita, California, Ranchita * Rincon, California, Rincon * Santa Ysabel, California, Santa Ysabel * Shelter Valley, California, Shelter Valley * Tecate, California, Tecate * Warner Springs, California, Warner Springs * Wynola, California, Wynola


Potential future incorporations and past efforts

Some Census-designated place, CDP's and other Unincorporated area, unincorporated communities of San Diego County have explored incorporating as independent cities/towns in the past, some of which have seen efforts culminate in ballot initiatives. Alpine, California, Alpine, Fallbrook, California, Fallbrook, Lakeside, California, Lakeside, Ramona, California, Ramona, Rancho Santa Fe, California, Rancho Santa Fe and Spring Valley, San Diego County, California, Spring Valley have been tied to various incorporation studies, organized efforts and discussions in the past. Voters in Fallbrook previously rejected incorporation in 1981 and 1987. Rancho Santa Fe residents also rejected incorporation in 1987. Among the existing cities of San Diego County, some had multiple failed incorporation efforts before ultimately succeeding in becoming a city. Lemon Grove, California, Lemon Grove, for example, saw incorporation measures fail in 1955, 1958 and 1964 before a successful incorporation vote in 1977. Other cities have seen incorporation success thanks to mergers of neighboring unincorporated communities. Encinitas, for example, became a city through a combined effort between the then-unincorporated communities of Cardiff-by-the-Sea, Encinitas, California, Cardiff-by-the-Sea, Leucadia, Encinitas, California, Leucadia, New Encinitas, Old Encinitas and Olivenhain, Encinitas, California, Olivenhain in 1986. Encinitas and Solana Beach in 1986 remain the most recent examples of successful campaigns for cityhood within the County of San Diego.


Indian reservations

San Diego County has 18 federally recognized Indian reservations, more than any other county in the United States. Although they are typical in size to other Indian reservations in California (many of which are termed "Rancherías"), they are relatively tiny by national standards, and all together total of area. * Barona Group of Capitan Grande Band of Mission Indians, Barona Indian Reservation *Campo Indian Reservation *Capitan Grande Reservation *Ewiiaapaayp Band of Kumeyaay Indians, Ewiiaapaayp Indian Reservation * Inaja Band of Diegueno Mission Indians, Inaja and Cosmit Indian Reservation *Jamul Indian Village * La Jolla Band of Luiseno Indians, La Jolla Indian Reservation * La Posta Band of Diegueno Mission Indians, La Posta Indian Reservation *Los Coyotes Band of Cahuilla and Cupeno Indians, Los Coyotes Indian Reservation *Manzanita Band of Diegueno Mission Indians, Manzanita Indian Reservation * Mesa Grande Band of Diegueno Mission Indians, Mesa Grande Indian Reservation * Pala Indian Reservation * Pauma and Yuima Indian Reservation *Rincon Indian Reservation *San Pasqual Band of Diegueno Mission Indians, San Pasqual Indian Reservation *Iipay Nation of Santa Ysabel, Santa Ysabel Indian Reservation *Sycuan Band of the Kumeyaay Nation, Sycuan Indian Reservation * Viejas Group of Capitan Grande Band of Mission Indians, Viejas Indian Reservation


Population ranking

The population ranking of the following table is based on the 2020 census of San Diego County. † ''county seat''


See also

*List of breweries in San Diego County, California *List of high schools in San Diego County, California *List of media set in San Diego, List of media set in San Diego County, California *List of museums in San Diego County, California *List of school districts in San Diego County, California *List of United States counties and county-equivalents *National Register of Historic Places listings in San Diego County, California *San Diego Association of Governments, San Diego Association of Governments (SANDAG)


Notes


References


Further reading

*Pryde, Philip R. ''San Diego: An Introduction to the Region'' (4th ed. 2004), a historical geography


External links

*
San Diego Association of Governments (SANDAG) official website

San Diego Tourism Authority

San Diego Geographic Information Source
{{Authority control San Diego County, California, 1850 establishments in California California counties Counties in Southern California Geography of San Diego County, California Metropolitan areas of California Populated places established in 1850 San Diego metropolitan area Majority-minority counties in California