County of Alameda
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Alameda County ( ) is a county located in the U.S. state of California. As of the 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and
21st 21 (twenty-one) is the natural number following 20 and preceding 22. The current century is the 21st century AD, under the Gregorian calendar. In mathematics 21 is: * a composite number, its proper divisors being 1, 3 and 7, and a defici ...
most populous nationally. The county seat is
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
. Alameda County is in the San Francisco Bay Area, occupying much of the East Bay region. The Spanish word ''alameda'' means either "a grove of poplars...or a tree lined street." The name was originally used to describe the Arroyo de la Alameda. The willow and sycamore trees along the banks of the river reminded the early Spanish explorers of a road lined with trees. Although a strict translation to English might be "Poplar Grove Creek," the name of the principal stream that flows through the county is now simply "
Alameda Creek , name_etymology = Spanish , image = Bridgeatnilesrivercalifornia.JPG , image_caption = Alameda Creek at Niles, Fremont , map = , map_size = , map_caption = , pushpin_map = US ...
." Alameda County is part of the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area, and the San Jose–San Francisco–Oakland, CA Combined Statistical Area.


History

The county was formed on March 25, 1853, from a large portion of
Contra Costa County ) of the San Francisco Bay , subdivision_type = Country , subdivision_name = United States , subdivision_type1 = State , subdivision_name1 = California , subdivision_type2 ...
and a smaller portion of Santa Clara County. The county seat at the time of the county's formation was located at Alvarado, now part of Union City. In 1856, it was moved to San Leandro, where the county courthouse was destroyed by the devastating 1868 quake on the Hayward Fault. The county seat was then re-established in the town of Brooklyn from 1872 to 1875. Brooklyn is now part of
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
, which has been the county seat since 1873. Much of what is now an intensively urban region was initially developed as a trolley car suburb of San Francisco in the late 19th and early 20th centuries. The historical progression from Native American tribal lands to Spanish then Mexican ranches, then to farms, ranches, and orchards, then to multiple city centers and suburbs, is shared with the adjacent and closely associated
Contra Costa County ) of the San Francisco Bay , subdivision_type = Country , subdivision_name = United States , subdivision_type1 = State , subdivision_name1 = California , subdivision_type2 ...
.


Events

The annual county fair is held at the
Alameda County Fairgrounds The Alameda County Fairgrounds is a facility located in Pleasanton, California. It is home to the annual Alameda County Fair, held since 1912, as well as numerous trade shows and community events. Located on its grounds, the Pleasanton Fairground ...
in
Pleasanton Pleasanton may refer to: Places * Pleasanton, California * Pleasanton, Iowa * Pleasanton, Kansas * Pleasanton, Nebraska * Pleasanton, New Mexico * Pleasanton, Ohio * Pleasanton, Texas * Pleasanton Township, Michigan Other * Pleasanton High School ...
. The fair runs for four weekends from June to July. Attractions include horse racing, carnival rides,
4-H 4-H is a U.S.-based network of youth organizations whose mission is "engaging youth to reach their fullest potential while advancing the field of youth development". Its name is a reference to the occurrence of the initial letter H four times i ...
exhibits, and live bands.


Geography and climate

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 a total area of , of which is land and (10%) is water. The
San Francisco Bay San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, and Oakland. San Francisco Bay drains water from a ...
borders the county on the west. The crest of the
Berkeley Hills The Berkeley Hills are a range of the Pacific Coast Ranges that overlook the northeast side of the valley that encompasses San Francisco Bay. They were previously called the "Contra Costa Range/Hills" (from the original Spanish ''Sierra de la C ...
form part of the northeastern boundary and reach into the center of the county. A coastal plain several miles wide lines the bay; and is Oakland's most populous region. Livermore Valley lies in the eastern part of the county. Amador Valley abuts the western edge of Livermore Valley and continues west to the Pleasanton Ridge. The ridges and valleys of the Diablo Range, containing the county's highest peaks, cover the very sparsely populated southeast portion of the county. The Hayward Fault, a major branch of the San Andreas Fault to the west, runs through the most populated parts of Alameda County, while the Calaveras Fault runs through the southeastern part of the county. The areas near the Bay itself have a maritime Mediterranean climate whereas behind the mountains, summers are a lot warmer. The climate charts below are for
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
and inland Livermore.


Neighboring counties

The City and County of San Francisco, California, borders the county on the west, and has a small land border with the city of Alameda, California due to land filling. Santa Clara County borders the county on the south. San Joaquin County borders the county on the east.
Contra Costa County ) of the San Francisco Bay , subdivision_type = Country , subdivision_name = United States , subdivision_type1 = State , subdivision_name1 = California , subdivision_type2 ...
borders the county on the north.
Stanislaus County , image_skyline = , image_caption = Images, from top down, left to right: Modesto Arch, Knights Ferry's General Store, a view of the Tuolumne River from Waterford , image_flag = , i ...
borders the county on the easternmost end of its southern boundary for .


National protected area

* Don Edwards San Francisco Bay National Wildlife Refuge (part)


Demographics


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.''


2014

A 2014 analysis by '' The Atlantic'' found Alameda County to be the fourth most racially diverse county in the United States, in terms of closest to equal representation of each racial and ethnic group,—behind Aleutians West Census Area and
Aleutians East Borough Aleutians East Borough () is a 2nd class List of boroughs and census areas in Alaska, borough in the U.S. state of Alaska. As of the 2020 United States Census, 2020 census the borough's population was 3,420. The borough seat is Sand Point, Alas ...
in Alaska, and Queens County in New York—as well as the most diverse county in California. The 2020 census shows Alameda as having one of the highest Asian percentages and being the only county in the continental US, along with neighboring Santa Clara County, California, to have an Asian plurality - consisting largely of Chinese, Indian and Filipino ancestry.


2011


Places by population, race, and income


2010

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 servin ...
reported that Alameda County had a population of 1,510,271. The population density was . The racial makeup of Alameda County was 649,122 (43.0%) White, 190,451 (12.6%) African American, 9,799 (0.6%) Native American, 394,560 (26.1%)
Asian Asian may refer to: * Items from or related to the continent of Asia: ** Asian people, people in or descending from Asia ** Asian culture, the culture of the people from Asia ** Asian cuisine, food based on the style of food of the people from Asi ...
(9.7% Chinese, 5.5% Filipino, 4.8% Indian, 2.0% Vietnamese, 1.2% Korean, 0.8% Japanese, 2.2% Other Asian), 12,802 (0.8%) Pacific Islander, 162,540 (10.8%) from other races, and 90,997 (6.0%) from two or more races. Hispanic or
Latino Latino or Latinos most often refers to: * Latino (demonym), a term used in the United States for people with cultural ties to Latin America * Hispanic and Latino Americans in the United States * The people or cultures of Latin America; ** Latin A ...
of any race were 339,889 persons (22.5%): 16.4% Mexican, 0.8% Puerto Rican, 0.2% Cuban, 5.1% Other Hispanic.


2000

As of the census of 2000, there were 1,443,741 people, 523,366 households, out of which 32.6% had children under the age of 18 living within them, 47.0%
married couples Marriage, also called matrimony or wedlock, is a culturally and often legally recognized union between people called spouses. It establishes rights and obligations between them, as well as between them and their children, and between t ...
living together, 13.0% had a female householder with no husband present, and 35.2% were non-families. 26.0% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.31. In the county, the population was spread out, with 24.6% under the age of 18, 9.6% from 18 to 24, 33.9% from 25 to 44, 21.7% from 45 to 64, and 10.2% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 96.60 males. For every 100 females age 18 and over, there were 94.00 males. The median income for a household in the county was $55,946, and the median income for a family was $65,857 (these figures had risen to $66,430 and $81,341 respectively as of a 2007 estimate). Males had a median income of $47,425 versus $36,921 for females. The per capita income for the county was $26,680. About 7.7% of families and 11.0% of the population were below the poverty line, including 13.5% of those under age 18 and 8.1% of those age 65 or over. In 2000, the largest denominational group was the Catholics (with 306,437 adherents) . The largest religious bodies were the Catholic Church (with 306,437 members) and Judaism (with 32,500 members).


2019 United States Census Bureau American Community Survey estimates

According to 2019 US Census Bureau estimates, Alameda County's population was 38.8% White (30.4%
Non-Hispanic White Non-Hispanic whites or Non-Latino whites are Americans who are classified as "white", and are not of Hispanic (also known as "Latino") heritage. The United States Census Bureau defines ''white'' to include European Americans, Middle Eastern Amer ...
and 8.4%
Hispanic White In the United States, a white Hispanic or Latino is an individual who is of full or partial Hispanic or Latino descent, the largest group being white Mexican Americans. Although not differentiated in the U.S. Census definition, White Latino Ame ...
), 10.7% Black or African American, 31.1%
Asian Asian may refer to: * Items from or related to the continent of Asia: ** Asian people, people in or descending from Asia ** Asian culture, the culture of the people from Asia ** Asian cuisine, food based on the style of food of the people from Asi ...
, 11.5% Some Other Race, 0.8% Native American and Alaskan Native, 0.8% Pacific Islander and 6.4% from
two or more races 2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and only even prime number. Because it forms the basis of a duality, it has religious and spiritual significance in many culture ...
. The White population continues to remain the largest racial category in Alameda County and includes the 37.7% of Hispanics who self-identify as White. The remainder of Hispanics self-identify as Other Race (49.2%), Multiracial (8.7%), American Indian and Alaskan Native (1.9%), Black (1.5%), Asian (0.9%), and Hawaiian and Pacific Islander (0.2%). The Black population continues to decline and at 10.7% (including
Black Hispanics Black Hispanic and Latino Americans, also called Afro-Hispanics ( es, Afrohispano, links=no), Afro-Latinos or Black Hispanics, or Black Latinos are classified by the United States Census Bureau, Office of Management and Budget, and other U.S. ...
) is below the national average of 12.8% (including Black Hispanics). The Black population peaked in the 1980 Census at 18.4%. Alameda county has the 2nd highest percentage of Black residents in California after Solano County at 13.4%. If Hispanics are treated as a separate category from race, Alameda County's population was 30.4% White, 30.9%
Asian Asian may refer to: * Items from or related to the continent of Asia: ** Asian people, people in or descending from Asia ** Asian culture, the culture of the people from Asia ** Asian cuisine, food based on the style of food of the people from Asi ...
, 22.3% Hispanic-Latino, 10.3% Black or African American, 0.5% Some Other Race, 0.3% Native American and Alaskan Native, 0.8% Pacific Islander and 4.4% from
two or more races 2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and only even prime number. Because it forms the basis of a duality, it has religious and spiritual significance in many culture ...
. Asian Americans are now the largest racial/ethnic group at 30.9% (excluding Asian Hispanics). White Non-Hispanic Americans are the largest minority group at 30.4% of the population. By ethnicity, 22.3% of the total population is Hispanic-Latino (of any race) and 77.7% is Non-Hispanic (of any race). If treated as a category separate from race, Hispanics are the third largest minority group in Alameda County. The largest ancestry group of Hispanics in Alameda County (2018) are of
Mexican Mexican may refer to: Mexico and its culture *Being related to, from, or connected to the country of Mexico, in North America ** People *** Mexicans, inhabitants of the country Mexico and their descendants *** Mexica, ancient indigenous people ...
descent (72.9% of Hispanics) followed by
Salvadoran Salvadorans (Spanish: ''Salvadoreños''), also known as Salvadorians (alternate spelling: Salvadoreans), are citizens of El Salvador, a country in Central America. Most Salvadorans live in El Salvador, although there is also a significant Salvado ...
descent (5.5% of Hispanics), Guatemalan descent (3.9%), Puerto Rican descent (3.4%),
Spaniard Spaniards, or Spanish people, are a Romance ethnic group native to Spain. Within Spain, there are a number of national and regional ethnic identities that reflect the country's complex history, including a number of different languages, both ind ...
descent (2.0%),
Nicaraguan Nicaragua (; ), officially the Republic of Nicaragua (), is the largest country in Central America, bordered by Honduras to the north, the Caribbean to the east, Costa Rica to the south, and the Pacific Ocean to the west. Managua is the countr ...
descent (1.7%), Peruvian descent (1.4%),
Cuban Cuban may refer to: * Something of, from, or related to Cuba, a country in the Caribbean * Cubans, people from Cuba, or of Cuban descent ** Cuban exile, a person who left Cuba for political reasons, or a descendant thereof * Cuban citizen, a perso ...
descent (1.2%), Colombian descent (1.1%), and those of other Hispanic ethnicity or of mixed Hispanic ethnicity (6.9%).


Law, government and politics


Government

The Government of Alameda 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 co ...
, California law, and the Charter of the County of Alameda. Much of the Government of California is in practice the responsibility of county governments such as the Government of Alameda County, while municipalities such as the City of
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
and the City of
Berkeley Berkeley most often refers to: *Berkeley, California, a city in the United States **University of California, Berkeley, a public university in Berkeley, California * George Berkeley (1685–1753), Anglo-Irish philosopher Berkeley may also refer ...
provide additional, often non-essential services. The County government provides countywide services such as elections and voter registration, law enforcement, jails, vital records, property records, tax collection, and public health. In addition it is the local government for all unincorporated areas, and provides services such as law enforcement to some incorporated cities under a contract arrangement. It is composed of the elected five-member Alameda County Board of Supervisors (BOS) as the county legislature, several other elected offices and officers including the
Sheriff A sheriff is a government official, with varying duties, existing in some countries with historical ties to England where the office originated. There is an analogous, although independently developed, office in Iceland that is commonly transla ...
, the
District Attorney In the United States, a district attorney (DA), county attorney, state's attorney, prosecuting attorney, commonwealth's attorney, or state attorney is the chief prosecutor and/or chief law enforcement officer representing a U.S. state in a l ...
,
Assessor An assessor may be: * ''Assessor'' (fish), a genus of fishes * Assessor (law), the assistant to a judge or magistrate * Assessor (Oxford), a senior officer of the University of Oxford * Assessor (property), an expert who calculates the value of pr ...
, Auditor-Controller/County Clerk/Recorder, Treasurer/Tax Collector, and numerous county departments and entities under the supervision of the County Administrator. In addition, several entities of the government of California have jurisdiction conterminous with Alameda County, such as the
Alameda County Superior Court The Alameda County Superior Court, officially the Superior Court of California, County of Alameda, is the California superior court with jurisdiction over Alameda County as established by Article VI of the Constitution of California. It functions ...
. The current supervisors are: * David Haubert, district 1, * Richard Valle, district 2, * Dave Brown, district 3, * Nate Miley, district 4, and * Keith Carson, district 5. The Board elects a president who presides at all meetings of the Board and appoints committees to handle work involving the major programs of the county. If the president is absent for a meeting, the vice president shall be responsible. A Board election occurs every two years for these positions. Supervisor Carson is serving currently as president; Supervisor Miley is vice president. The county's law enforcement is overseen by an elected Sheriff/Coroner and an elected District Attorney. The Sheriff supervises the deputies of the Alameda County Sheriff's Office, whose primary responsibilities include policing unincorporated areas of the county and cities within the county which contract with the Sheriff's Office for police services; providing security and law enforcement for county buildings including courthouses, the county jail and other county properties; providing support resources, such as a forensics laboratory and search and rescue capabilities, to other law enforcement agencies throughout the county; and serving the process of the county's Superior Court system. The District Attorney's office is responsible for prosecuting all criminal violations of the laws of the state of California, the county, or its constituent municipalities, in the Alameda County Superior Court. The current Sheriff is
Gregory J. Ahern Gregory J. Ahern (b. ) was the 22nd Sheriff of Alameda County, California, serving for four terms between 2007 and 2023, losing re-election in 2022 by 21.6% . Early life Ahern graduated from Moreau Catholic High School. He earned a Bachelor ...
, who was elected in 2006, succeeding Charles Plummer, who had served in the post for 20 years. The Sheriff's Office operates two jails: Santa Rita Jail in Dublin, and Glenn E. Dyer Detention Facility in downtown
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
. In 2009,
Nancy E. O'Malley Nancy O'Malley was the District Attorney for Alameda County, California. Biography O'Malley was appointed as DA for Alameda County in 2009 by the board of supervisors when her predecessor retired. She ran unopposed in 2010 and 2014. In Nove ...
was appointed Alameda County district attorney after
Tom Orloff Thomas Jensen Orloff is an American lawyer. He is the former district attorney for Alameda County, California. Orloff began work in the DA's office after graduating from the University of California, Berkeley for law in 1970, trying 25 murder ca ...
retired. She won re-election twice. She will not run for re-election in 2022. The Alameda County Fire Department (ACFD) was formed on July 1, 1993, as a dependent district, with the Board of Supervisors as its governing body. Municipal and specialized fire departments have been consolidated into the ACFD over the years. 1993 brought in the Castro Valley and Eden Consolidated FD, and the County Fire Patrol. San Leandro joined in 1995, Dublin in 1997,
Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory (LBNL), commonly referred to as the Berkeley Lab, is a United States Department of Energy National Labs, United States national laboratory that is owned by, and conducts scientific research on behalf of, t ...
in 2002,
Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory (LLNL) is a federal research facility in Livermore, California, United States. The lab was originally established as the University of California Radiation Laboratory, Livermore Branch in 1952 in response ...
in 2007, The
Alameda County Regional Emergency Communications Center An alameda is a street or path lined with trees () and may refer to: Places Canada *Alameda, Saskatchewan, town in Saskatchewan **Grant Devine Dam, formerly ''Alameda Dam'', a dam and reservoir in southern Saskatchewan Chile * Alameda (Santiag ...
in 2008, and Newark and Union City in 2010. Emeryville joined the ACFD in 2012. The
Alameda County Water District The Alameda County Water District (ACWD) is a public agency in Alameda County, California, United States, which has responsibilities for managing and protecting certain groundwater resources within Alameda County. While most of the county is serv ...
is a special district within Alameda County created to distribute water, but it is not operated by Alameda County administrators. It is operated by an elected board of directors.
Alameda County Superior Court The Alameda County Superior Court, officially the Superior Court of California, County of Alameda, is the California superior court with jurisdiction over Alameda County as established by Article VI of the Constitution of California. It functions ...
operates in twelve separate locations throughout the county, with its central René C. Davidson Courthouse located in Oakland near Lake Merritt. Most major criminal trials and complex civil cases are heard at this location or in courtrooms within the County Administration Building across the street.


State and federal representation

In the
California State Assembly The California State Assembly is the lower house of the California State Legislature, the upper house being the California State Senate. The Assembly convenes, along with the State Senate, at the California State Capitol in Sacramento. The A ...
, Alameda County is split between five districts: * , * , * , * , and * . In the
California State Senate The California State Senate is the upper house of the California State Legislature, the lower house being the California State Assembly. The State Senate convenes, along with the State Assembly, at the California State Capitol in Sacramento, Cal ...
, the county is split between three districts: * , * , and * . In the United States House of Representatives, the county is split between three districts: * , * , and * .


Politics

Since 1932, Alameda County has been a stronghold of the Democratic Party, with
Dwight Eisenhower Dwight David "Ike" Eisenhower (born David Dwight Eisenhower; ; October 14, 1890 – March 28, 1969) was an American military officer and statesman who served as the 34th president of the United States from 1953 to 1961. During World War II, ...
being the only Republican presidential nominee to have carried the county since. Prior to 1932, the county had been a Republican stronghold. Piedmont resident
William F. Knowland William Fife Knowland (June 26, 1908 – February 23, 1974) was an American politician and newspaper publisher. A member of the Republican Party, he served as a United States Senator from California from 1945 to 1959. He was Senate Majority Le ...
was the Republican U.S. Senate Leader from 1953 to 1959. Even when
Ronald Reagan Ronald Wilson Reagan ( ; February 6, 1911June 5, 2004) was an American politician, actor, and union leader who served as the 40th president of the United States from 1981 to 1989. He also served as the 33rd governor of California from 1967 ...
won the national popular vote by an 18.3% margin in
1984 Events January * January 1 – The Bornean Sultanate of Brunei gains full independence from the United Kingdom, having become a British protectorate in 1888. * January 7 – Brunei becomes the sixth member of the Association of Southeast A ...
, Walter Mondale won Alameda County by a larger margin. In
2004 2004 was designated as an International Year of Rice by the United Nations, and the International Year to Commemorate the Struggle Against Slavery and its Abolition (by UNESCO). Events January * January 3 – Flash Airlines Flight 6 ...
it voted for John Kerry, who won over 75% of the vote. Every city and town voted Democratic. George W Bush in 2004 was the last Republican to break 20% of the county's vote, his father (George H.W. Bush) in 1988 was the last to break 30% of the vote, and Ronald Reagan in 1984 was the last to break 40% of the vote (carrying 40.01%). The California Secretary of State, as of February 2019, reports that there are 883,942 registered voters in Alameda County. 489,759 (55.4%) are registered Democrats, 95,587 (10.8%) are registered Republicans, 36,649 (4.1%) are registered to minor political parties, and 261,947 (29.6%) declined to answer. Every city, town, and unincorporated area in Alameda County has more registered Democrats than Republicans. On November 4, 2008, Alameda County voted 61.92% against Proposition 8, which won statewide, and which amended 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 co ...
to ban same-sex marriage. The county garnered the sixth highest "no" vote, by percentage, of all California counties, and was the second largest county, by total voter turnout, to vote against it.


Voter registration statistics


= Cities by population and voter registration

=


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

The
Alameda County Office of Education Alameda County ( ) is a List of counties in California, county located in the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and List ...
oversees seventeen K–12 school districts and one K–8 district in Alameda County. In all, there are approximately 10,000 teachers serving 225,000 students. The ACOE also services three community college districts with a total enrollment of approximately 55,000 students. The
Alameda County Library The Alameda County Library, in Alameda County, California, is a public library system that provides services from eleven branch libraries in the cities of Albany, Dublin, Fremont, Newark and Union City and the unincorporated communities of C ...
operates libraries in the cities of Albany, Dublin, Fremont,
Newark Newark most commonly refers to: * Newark, New Jersey, city in the United States * Newark Liberty International Airport, New Jersey; a major air hub in the New York metropolitan area Newark may also refer to: Places Canada * Niagara-on-the ...
and Union City and the unincorporated communities of
Castro Valley Castro Valley is a census-designated place (CDP) in Alameda County, California, United States. At the 2010 census, it was the fifth most populous unincorporated area in California and the twenty-third most populous in the United States. The popula ...
and
San Lorenzo San Lorenzo is the Italian and Spanish name for Lawrence of Rome, Saint Lawrence, the 3rd-century Christian martyr, and may refer to: Places Argentina * San Lorenzo, Santa Fe * San Lorenzo Department, Chaco * Monte San Lorenzo, a mountain on t ...
. The cities of Alameda, Berkeley, Hayward, Livermore, Oakland, San Leandro, and Pleasanton have their own library systems.


Colleges and universities

Alameda County is home to the University of California, Berkeley, the flagship campus of the University of California system, and one of the largest and most prestigious research universities in the world. Other colleges and universities located within Alameda county include: * Berkeley City College * California State University, East Bay, one of the campuses of the California State University system * Chabot College, a two-year community college, part of the Chabot-Las Positas Community College District * College of Alameda, a two-year community college, part of the
Peralta Community College District The Peralta Community College District is the community college district serving northern Alameda County, California. The district operates four community colleges: Berkeley City College, Laney College and Merritt College in Oakland, and Coll ...
of northern Alameda County *
SAE Expression College SAE Expression College was a private for-profit college specializing in programs in the entertainment industry and located in Emeryville, California. It offers an around-the-clock schedule and eight week terms. It awards Bachelor's degrees after ...
, a for-profit school specializing in the entertainment industry *
Graduate Theological Union The Graduate Theological Union (GTU) is a consortium of eight private independent American theological schools and eleven centers and affiliates. Seven of the theological schools are located in Berkeley, California. The GTU was founded in 1962 ...
, a consortium of several Bay Area seminaries, affiliated with the University of California, Berkeley. * Holy Names University * Laney College, a two-year community college, part of the Peralta Community College system * Las Positas College *
Merritt College Merritt College is a public community college in Oakland, California. Merritt, like the other three campuses of the Peralta Community College District, is accredited by the Accrediting Commission for Community and Junior Colleges. The college e ...
, a two-year community college, part of the Peralta Community College system * Mills College, a private 4 year women's college and coeducational graduate school *
Ohlone College Ohlone College (Ohlone or OC) is a public community college with its main campus in Fremont, California and a second campus in Newark. It is part of the California Community College System. The Ohlone Community College District serves the cit ...
, part of the Ohlone Community College District * Samuel Merritt University


Public schools

;School districts K–12 unified school districts: *
Alameda Unified School District The Alameda Unified School District serves Alameda, California, United States. The school district is a "unified" district (as of 1936), meaning that it includes K-8 schools and high schools in the same jurisdiction. As with all California scho ...
* Albany Unified School District *
Berkeley Unified School District The Berkeley Unified School District (BUSD) is the public school district for the city of Berkeley, California, United States. The district is managed by the Superintendent of Schools, and governed by the Berkeley Board of Education, whose member ...
*
Castro Valley Unified School District The Castro Valley Unified School District (CVUSD) is located in Castro Valley, California, United States. It is a public preschool through adult school district. Overall, the district contains almost 9,000 students. It was created in 1965. The C ...
* Dublin Unified School District *
Emery Unified School District Emery Unified School District is a small public school district in Emeryville, California, United States, in the San Francisco Bay Area. Campuses The district currently operates two schools, Anna Yates Elementary school and Emery Secondary Sch ...
* Fremont Unified School District * Hayward Unified School District *
Livermore Valley Joint Unified School District Livermore Valley Joint Unified School District (LVJUSD) is a public school district located in Livermore, California, United States. It is located in Alameda County. Since May 2010, the Superintendent has been Kelly Bowers. In addition to Liver ...
* New Haven Unified School District *
Newark Unified School District The Newark Unified School District (NUSD) is the public school district for Newark, California, United States. NUSD was formed in 1964. As of 2021-22, NUSD consists of the following schools: * Birch Grove Primary Elementary School (Formerly nam ...
*
Oakland Unified School District Oakland Unified School District is a public education school district that operates a total of 80 elementary schools (TK–5), middle schools (6–8), and high schools (9–12). There are also 28 district-authorized charter schools in Oaklan ...
*
Piedmont Unified School District The Piedmont Unified School District (PUSD) comprises the seven schools in the city of Piedmont, California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a t ...
*
Pleasanton Unified School District The Pleasanton Unified School District (PUSD) is a public primary and secondary education school district located in Pleasanton, California, United States, a suburban town east of San Francisco. It consists of nine elementary schools, three midd ...
* San Leandro Unified School District *
San Lorenzo Unified School District San Lorenzo Unified School District is a school district in Alameda County, California, serving the CDP of San Lorenzo and portions of the cities of Hayward and San Leandro and the CDPs of Ashland, Castro Valley and Cherryland. It was establis ...
*
Sunol Glen Unified School District Sunol may refer to: * Sunol, California * Sunol-Midtown, California * Sunol, Nebraska * Sunol Regional Wilderness The Sunol Regional Wilderness is a regional park in Alameda County, the eastern San Francisco Bay Area, Northern California. It i ...
Others: * Lammersville Joint Unified School District (high) *
Mountain House Elementary School District A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher ...
(elementary) ; State-operated schools *
California School for the Blind The California School for the Blind is a public educational institution for blind children, K-12, located in Fremont, California. Its campus is located next to the California School for the Deaf. History The San Francisco area's education of b ...
*
California School for the Deaf, Riverside The California School for the Deaf, Riverside (CSD-R or CSDR) is a school for deaf children located in Riverside, California. The school educates children from all over Southern California. Its companion school in Northern California is California ...


Arts

The
Alameda County Arts Commission An alameda is a street or path lined with trees () and may refer to: Places Canada *Alameda, Saskatchewan, town in Saskatchewan ** Grant Devine Dam, formerly ''Alameda Dam'', a dam and reservoir in southern Saskatchewan Chile * Alameda (Santiag ...
, a division of the county administration, under the California Arts Council, was created in 1965. Its fifteen appointed members act in an advisory capacity to the board of supervisors, in promoting the arts. The Oakland Museum of California has a substantial collection of California art works and historical artifacts.


Sports

The following sports teams play in Alameda County:


Parks and recreation

There are more than 350 parks located within the county. The East Bay Regional Park District operates within Alameda and neighboring Contra Costa County, with numerous parks within the county, including
Tilden Regional Park Charles Lee Tilden Regional Park, also known as Tilden Park or Tilden, [], is a regional park in the East Bay (San Francisco Bay Area), East Bay, part of the San Francisco Bay Area in California. It is between the Berkeley Hills and San Pablo R ...
, Redwood Regional Park,
Anthony Chabot Regional Park Anthony Chabot Regional Park is a regional park in Oakland, Alameda County, California in the United States. It is part of the East Bay Regional Park District system, and covers in the San Leandro Hills adjacent to Oakland, San Leandro and Castro ...
,
Coyote Hills Regional Park Coyote Hills Regional Park is a regional park encompassing nearly 978 acres of land and administered by the East Bay Regional Park District. The park, which was dedicated to public use in 1967, is located in Fremont, California, USA, on the sou ...
, Ardenwood Historic Farm,
Pleasanton Ridge Regional Park Pleasanton Ridge Regional Park is a park in the East Bay Regional Park District overlooking Pleasanton, California and the Livermore Valley to the east. The park is scheduled to grow by almost (''sic'') with the acquisition of the Tyler Ranch.'' ...
and
Vargas Plateau Regional Park Vargas Plateau Regional Park sits on a plateau in the Fremont Hills of Alameda County, California that overlooks the San Francisco Bay, Niles Canyon, and the cities of Fremont, Union City and Newark. The elevation of the park is about , making ...
. Eastshore State Park is located partially along the bay shore of northern Alameda County. The San Francisco Bay Trail, a project of the Association of Bay Area Governments, will run along the bay shore of the county. The Hayward Area Recreation and Park District is the largest special park district in California.


Transportation


Major highways

*
Interstate 80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one o ...
(Eastshore Freeway) * Interstate 205 (Robert T. Monagan Freeway) *
Interstate 238 Route 238, consisting of State Route 238 (SR 238) and Interstate 238 (I-238), is a mostly north–south state and auxiliary Interstate highway in the San Francisco Bay Area of California. The southern segment is signed as SR& ...
* Interstate 580 (MacArthur Freeway/Arthur Breed Freeway) * Interstate 680 (Sinclair Freeway) * Interstate 880 (Nimitz Freeway/Cypress Freeway) *
Interstate 980 Interstate 980 (I-980) is a short auxiliary Interstate Highway entirely within Oakland in Northern California, connecting I-580 and State Route 24 (SR 24) to I-880 near Downtown Oakland. I-980 passes the Oakland Convention ...
(John B. Williams Freeway) * State Route 13 (Warren Freeway/Tunnel Road/Ashby Avenue) * State Route 24 ( William Byron Rumford Freeway) * State Route 61 * State Route 77 * State Route 84 * State Route 92 (Jackson Street/San Mateo Bridge) * State Route 123 (San Pablo Avenue) – formerly
U.S. Route 40 U.S. Route 40 or U.S. Highway 40 (US 40), also known as the Main Street of America, is a major east–west United States Highway traveling across the United States from the Mountain States to the Mid-Atlantic States. As with most routes wh ...
* State Route 185 ( Mission Boulevard/East 14th Street) * State Route 238 (Mission Boulevard/Foothill Boulevard) * State Route 262 (Mission Boulevard)


Mass transit


Rail

* Altamont Corridor Express (ACE) – commuter rail using existing railroad tracks; primarily brings commuters from San Joaquin County to Santa Clara County * Amtrak ** '' California Zephyr'' – intercity train route running between Emeryville and Chicago. ** '' Capitol Corridor'' – commuter rail using existing railroad tracks, extending from San Jose to Sacramento, running through western Alameda County ** '' Coast Starlight'' – intercity train route running between Los Angeles and Seattle via Oakland and Emeryville ** '' San Joaquin'' – Amtrak route between Oakland and Bakersfield through Fresno and the Central Valley * Bay Area Rapid Transit (BART) – rapid transit commuter rail centered on northwest Oakland, primarily serving commuters to downtown San Francisco and downtown Oakland * ''
Valley Link The Tri-Valley-San Joaquin Valley Regional Rail Authority is a special-purpose district body formed for the sole purpose of providing a public transit connection, known as Valley Link, between Indian gauge, broad-gauge Bay Area Rapid Transit (BAR ...
'' – planned commuter rail running between the Tri-Valley and San Joaquin County (expected to commence in 2028)


Bus

*
AC Transit AC Transit (Alameda-Contra Costa Transit District) is an Oakland-based public transit agency serving the western portions of Alameda and Contra Costa counties in the East Bay of the San Francisco Bay Area. AC Transit also operates "Transbay" ro ...
– local
bus A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...
system in western Alameda County and west Contra Costa County, with additional service across the three bridges from Alameda County to downtown San Francisco, San Mateo, and Palo Alto * WHEELS – bus system in the cities of southeastern Alameda County *
Union City Transit Union City Transit is a public transit service in Union City, California, in the San Francisco Bay Area. , Union City Transit operates 5 bus lines that connect riders to local destinations, such as schools, shopping centers, and the Union City ...
– local city bus service within Union City in addition to AC Transit *
Emery-Go-Round Emery Go-Round is a fare-free public bus system in Emeryville, California. It also provides service to small portions of the adjacent cities of Oakland and Berkeley Berkeley most often refers to: *Berkeley, California, a city in the United ...
– free bus service in
Emeryville Emeryville may refer to: * Emeryville, California Emeryville is a city located in northwest Alameda County, California, in the United States. It lies in a corridor between the cities of Berkeley and Oakland, with a border on the shore of San ...
* Dumbarton Express – additional service across the Dumbarton Bridge between Fremont and Palo Alto * Santa Clara Valley Transportation Authority (VTA) – commuter service between southern Alameda county and job centers in the Silicon Valley


Ferry

*
Alameda / Oakland Ferry San Francisco Bay Ferry is a public transit passenger ferry service in the San Francisco Bay, administered by the San Francisco Bay Area Water Emergency Transportation Authority (WETA). In , the system had a ridership of , or about per weekday a ...
and Harbor Bay Ferry – connect Oakland, Alameda, and Bay Farm Island with downtown San Francisco


Airports

The main airport is the Oakland International Airport, with two general aviation airports, the
Hayward Executive Airport Hayward Executive Airport is a municipal airport in Hayward, California. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a ''reliever airport''. The towered airport near the east shore of San Francisco Bay w ...
and
Livermore Municipal Airport Livermore Municipal Airport is three miles west of Livermore, California, in Alameda County, California. The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021 categorized it as a regional reliev ...
.


Services

Alameda Health System Alameda Health System (AHS), formerly Alameda County Medical Center (ACMC), is an integrated public health care system organized as a public hospital authority. Formerly operated by Alameda County, California, it now has an independent board of ...
operates the public health system in Alameda County. It operates five hospitals ( Alameda Hospital, Fairmont Hospital, Highland Hospital, John George Psychiatric Hospital, and San Leandro Hospital), and four primary care medical clinics (called ambulatory wellness centers) within the county. The Alameda County Community Food Bank nonprofit provides food bank resources to residents. The Family Emergency Shelter Coalition coordinates services for homeless families.


Landmarks

Alameda County has eight National Historic Landmarks: The Abbey, Joaquin Miller House, First Church of Christ, Scientist, USS ''Hornet'' (CVS-12) (aircraft carrier), Lake Merritt Wild Duck Refuge, Lightship WAL-605, ''Relief'',
Paramount Theatre Paramount Theater or Paramount Theatre may refer to: Canada * Scotiabank Theatre or Paramount Theatre, a chain of theatres owned by Cineplex Entertainment ** Scotiabank Theatre Toronto or Paramount Theatre Toronto China * Paramount (Shanghai) o ...
, ''Potomac'' (Presidential yacht), and Room 307, Gilman Hall, University of California. The county has a large number of National Historic Places, as well as a number of California Historical Landmarks.


Sister county

Alameda has a sister county:
Taoyuan County, Taiwan Taoyuan () is a special municipality of the Republic of China (Taiwan) located in northwestern Taiwan, neighboring New Taipei City to the north-east, Yilan County to the south-east, and Hsinchu County to the south-west. Taoyuan District ...
(now Taoyuan City).


Communities


Cities

* Alameda * Albany *
Berkeley Berkeley most often refers to: *Berkeley, California, a city in the United States **University of California, Berkeley, a public university in Berkeley, California * George Berkeley (1685–1753), Anglo-Irish philosopher Berkeley may also refer ...
* Dublin *
Emeryville Emeryville may refer to: * Emeryville, California Emeryville is a city located in northwest Alameda County, California, in the United States. It lies in a corridor between the cities of Berkeley and Oakland, with a border on the shore of San ...
* Fremont * Hayward * Livermore *
Newark Newark most commonly refers to: * Newark, New Jersey, city in the United States * Newark Liberty International Airport, New Jersey; a major air hub in the New York metropolitan area Newark may also refer to: Places Canada * Niagara-on-the ...
*
Oakland Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay A ...
(county seat) * Piedmont *
Pleasanton Pleasanton may refer to: Places * Pleasanton, California * Pleasanton, Iowa * Pleasanton, Kansas * Pleasanton, Nebraska * Pleasanton, New Mexico * Pleasanton, Ohio * Pleasanton, Texas * Pleasanton Township, Michigan Other * Pleasanton High School ...
* San Leandro * Union City


Census-designated places

* Ashland *
Castro Valley Castro Valley is a census-designated place (CDP) in Alameda County, California, United States. At the 2010 census, it was the fifth most populous unincorporated area in California and the twenty-third most populous in the United States. The popula ...
* Cherryland * Fairview *
San Lorenzo San Lorenzo is the Italian and Spanish name for Lawrence of Rome, Saint Lawrence, the 3rd-century Christian martyr, and may refer to: Places Argentina * San Lorenzo, Santa Fe * San Lorenzo Department, Chaco * Monte San Lorenzo, a mountain on t ...
* Sunol


Unincorporated communities

* Altamont * Brightside * Carpenter * Dougherty * Dresser * East Pleasanton * Kilkare Woods * Komandorski Village * Mendenhall Springs * Midway * Mountain House * Mowry Landing * San Ramon Village * Scotts Corner * Verona


Former townships

* Oakland Township – the northern portion subsequently became the cities of Berkeley and Albany. * Alameda Township – now essentially coterminous with the City of Alameda. * Brooklyn Township – mostly contained within Oakland and Piedmont. * Eden Township – partly incorporated into San Leandro and Hayward, the rest contains the communities of Castro Valley, San Lorenzo, and other unincorporated areas. * Washington Township – contains Union City, Newark, Fremont, and small unincorporated areas nearby. * Murray Township — Contains cities of Dublin, Pleasanton, and Livermore, and substantial unincorporated areas including Sunol.


Population ranking

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


See also

* USS ''Alameda County'' (LST-32), the only US Naval vessel named after the county *
National Register of Historic Places listings in Alameda County, California __NOTOC__ This is a list of the National Register of Historic Places listings in Alameda County, California. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Alameda County, Ca ...
*
Solar power in Alameda County Solar power in California includes utility-scale solar power plants as well as local distributed generation, mostly from rooftop photovoltaics. It has been growing rapidly because of high insolation, community support, declining solar costs, ...


Notes


People

* Natalie Gregory Former Child Star Actress First Sister * Sharee Gregory Actress and Sister of Natalie Gregory


References


External links

*
map of Alameda County with supervisorial district boundaries

Alameda County Fairgrounds – Annual county fair June to July

A short film about Alameda County from 1958

Alameda County Fire Department

Alameda County Fire Department Training Division
* Hiking trails in Alameda County, at the Berkeley Wiki website {{Coord, 37.65, -121.91, display=title, type:adm2nd_region:US-CA_source:UScensus1990 California counties Counties in the San Francisco Bay Area 1853 establishments in California Populated places established in 1853 Majority-minority counties in California