Allegheny County () is a

county A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...

in the

Commonwealth A commonwealth is a traditional English term for a political community founded for the common good. Historically, it has been synonymous with "republic". The noun "commonwealth", meaning "public welfare, general good or advantage", dates from the ...

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

. It is located in Southwestern Pennsylvania. As of the 2020 census, the population was 1,250,578, making it the state's second-most populous county, following Philadelphia County. The

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 st ...

Pittsburgh Pittsburgh ( ) is a city in the Commonwealth (U.S. state), Commonwealth of Pennsylvania, United States, and the county seat of Allegheny County, Pennsylvania, Allegheny County. It is the most populous city in both Allegheny County and Wester ...

. Allegheny County is included in the

Pittsburgh, PA Metropolitan Statistical Area Greater Pittsburgh is a populous region centered around its largest city and economic hub, Pittsburgh, Pennsylvania. The region encompasses Pittsburgh's urban core county, Allegheny County, Pennsylvania, Allegheny, and six adjacent Pennsylvania ...

, and in the Pittsburgh Designated Market Area. Allegheny was the first county in Pennsylvania to be given a Native American name. It was named after the

Lenape The Lenape (, , or Lenape , del, Lënapeyok) also called the Leni Lenape, Lenni Lenape and Delaware people, are an indigenous peoples of the Northeastern Woodlands, who live in the United States and Canada. Their historical territory includ ...

word for the

Allegheny River The Allegheny River ( ) is a long headwater stream of the Ohio River in western Pennsylvania and New York (state), New York. The Allegheny River runs from its headwaters just below the middle of Pennsylvania's northern border northwesterly into ...

. The meaning of "Allegheny" is uncertain. It is usually said to mean "fine river". Stewart says that the name may come from a Lenape account of an ancient mythical tribe called ''"Allegewi"'', who lived along the river before being taken over by the Lenape.

History

Prior to European contact, this area was settled for thousands of years by succeeding cultures of indigenous peoples. During the colonial era, historic native groups known by the colonists to settle in the area included members of western nations of the

Iroquois The Iroquois ( or ), officially the Haudenosaunee ( meaning "people of the longhouse"), are an Iroquoian-speaking confederacy of First Nations peoples in northeast North America/ Turtle Island. They were known during the colonial years to ...

, such as the Seneca; the

, who had been pushed from the East by European-American settlers; the

Shawnee The Shawnee are an Algonquian-speaking indigenous people of the Northeastern Woodlands. In the 17th century they lived in Pennsylvania, and in the 18th century they were in Pennsylvania, Ohio, Indiana and Illinois, with some bands in Kentucky a ...

, who also had territory in Ohio; and the

Mingo The Mingo people are an Iroquoian group of Native Americans, primarily Seneca and Cayuga, who migrated west from New York to the Ohio Country in the mid-18th century, and their descendants. Some Susquehannock survivors also joined them, and ...

, a group made up of a variety of peoples from more eastern tribes. European fur traders such as

Peter Chartier Peter Chartier (16901759) (Anglicized version of Pierre Chartier, sometimes written Chartiere, Chartiers, Shartee or Shortive) was a fur trader of mixed Shawnee and French parentage. Multilingual, he later became a leader and a band chief among ...

established trading posts in the region in the early eighteenth century. Darlington map of Pennsylvania 1680

In 1749, Captain

Pierre Joseph Céloron de Blainville Pierre-Joseph Céloron de Blainville (29 December 1693, Montreal—14 April 1759, Montreal) — also known as Celeron de Bienville (or Céleron, or Céloron, etc.) — was a French Canadian Officer of Marine. In 1739 and '40 he led a detachment to ...

claimed the

Ohio Valley The Ohio River is a long river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing southwesterly from western Pennsylvania to its mouth on the Mississippi River at the southern tip of Illinoi ...

and all of western Pennsylvania for King

Louis XV of France Louis XV (15 February 1710 – 10 May 1774), known as Louis the Beloved (french: le Bien-Aimé), was King of France from 1 September 1715 until his death in 1774. He succeeded his great-grandfather Louis XIV at the age of five. Until he reached ...

. The captain traveled along the

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

and Allegheny rivers. He installed lead plates in the ground to mark the land for France. Most of the towns during that era were developed along

waterway A waterway is any navigable body of water. Broad distinctions are useful to avoid ambiguity, and disambiguation will be of varying importance depending on the nuance of the equivalent word in other languages. A first distinction is necessary b ...

s, which were the primary transportation routes, as well as providing water for domestic uses. Through the eighteenth century, both the French and the British competed for control over the local rivers in this frontier territory of North America. Native American bands and tribes allied with the colonists to differing degrees, often based on their trading relationships. The British sent Major

George Washington George Washington (February 22, 1732, 1799) was an American military officer, statesman, and Founding Father who served as the first president of the United States from 1789 to 1797. Appointed by the Continental Congress as commander of th ...

to expel the French from their posts, with no success. He also nearly drowned in the ice-filled Allegheny River while returning to camp. The English tried again in 1754 to establish a post in the area. They sent 41 Virginians to build Fort Prince George. The French learned of the plan and sent an army to capture the fort. They resumed building it and added increased defensive fortification, renaming it as

Fort Duquesne Fort Duquesne (, ; originally called ''Fort Du Quesne'') was a fort established by the French in 1754, at the confluence of the Allegheny and Monongahela rivers. It was later taken over by the British, and later the Americans, and developed a ...

. Given its strategic location at the Ohio, Fort Duquesne became an important focal point of the

French and Indian War The French and Indian War (1754–1763) was a theater of the Seven Years' War, which pitted the North American colonies of the British Empire against those of the French, each side being supported by various Native American tribes. At the ...

. The first British attempt to retake the fort, the Braddock Expedition, failed miserably. In 1758 British forces under General John Forbes recaptured the fort; he had it destroyed to prevent any use by the French. The British built a new, larger fort on the site, including a moat, and named it Fort Pitt. The historic site has been preserved as Pittsburgh's Point State Park. Under their colonial charters, both Pennsylvania and

Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...

claimed the region that is now Allegheny County. Pennsylvania administered most of the region as part of its Westmoreland County. Virginia considered everything south of the

Ohio River The Ohio River is a long river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing southwesterly from western Pennsylvania to its mouth on the Mississippi River at the southern tip of Illino ...

and east of the

to be part of its

Yohogania County Yohogania County was created by the new state of Virginia in 1776, in an area long disputed between Virginia and Pennsylvania. The county ceased to exist after the border dispute between the two states was resolved in the 1780s. Thus, it is somet ...

, and governed it from Fort Dunmore. In addition, parts of the county were located in the proposed British colony of Vandalia and the proposed U.S. state of

Westsylvania Westsylvania was a proposed state of the United States located in what is now West Virginia, southwestern Pennsylvania, and small parts of Kentucky, Maryland, and Virginia. First proposed early in the American Revolution, Westsylvania would have ...

. The overlapping boundaries, multiple governments, and confused deed claims soon proved unworkable. Near the end of the American Revolutionary War, in 1780 Pennsylvania and Virginia agreed to extend the

Mason–Dixon line The Mason–Dixon line, also called the Mason and Dixon line or Mason's and Dixon's line, is a demarcation line separating four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia (part of Virginia ...

westward. This region was assigned to Pennsylvania. From 1781 until 1788, much of what Virginia had claimed as part of Yohogania County was administered as a part of the newly created

Washington County, Pennsylvania Washington County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 209,349. Its county seat is Washington. Washington County is part of the Pittsburgh, PA Metropolitan Statistical Area. The county i ...

. Allegheny County was officially created on September 24, 1788, from parts of

Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on ...

and Westmoreland counties. It was formed to respond to pressure from the increase in settlers living in the area around Pittsburgh; this was designated as the

in 1791. The county originally extended north to the shores of

Lake Erie Lake Erie ( "eerie") is the fourth largest lake by surface area of the five Great Lakes in North America and the eleventh-largest globally. It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has t ...

; it was reduced to its current borders by 1800. As population increased in the territory, other counties were organized. AlleghenyCtyCourthouse-082904

In the 1790s, the

United States federal government The federal government of the United States (U.S. federal government or U.S. government) is the Federation#Federal governments, national government of the United States, a federal republic located primarily in North America, composed of 50 ...

imposed a

whiskey Whisky or whiskey is a type of distilled alcoholic beverage made from fermented grain mash. Various grains (which may be malted) are used for different varieties, including barley, corn, rye, and wheat. Whisky is typically aged in wooden cask ...

excise tax. Farmers who had depended on whiskey income refused to pay and started the so-called

Whiskey Rebellion The Whiskey Rebellion (also known as the Whiskey Insurrection) was a violent tax protest in the United States beginning in 1791 and ending in 1794 during the presidency of George Washington. The so-called "whiskey tax" was the first tax impo ...

after driving off tax collector John Neville. After a series of demonstrations by farmers, President

sent troops to suppress the frontier rebellion. The area developed rapidly through the 1800s with industrialization. It became the nation's prime

steel Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistant ty ...

producer by the late 19th century and Pittsburgh was nicknamed "Steel Capital of the World". In 1913 the county's 125th anniversary was celebrated with a week-long series of events. The final day, September 27, was marked by a steamboat parade of 30 paddle wheelers. They traveled from

Monongahela Wharf The Monongahela Wharf was the key wharf of Pittsburgh, Pennsylvania, United States, on the Monongahela River. It was in use from the late 19th century until the dam was built in the Ohio river, causing it to be underwater. It was used by steamb ...

down the Ohio to the Davis Island Dam. The boats in line were the ''Steel City'' (formerly the Pittsburgh and Cincinnati packet ''Virginia''), the flag ship; ''City of Parkersburg'', ''Charles Brown'', ''Alice Brown'', ''Exporter'', ''Sam Brown'', ''Boaz'', ''Raymond Horner'', ''Swan'', ''Sunshine'', ''

I. C. Woodward ''I. C. Woodward'' was a side-wheel packet boat launched in July 1898 by Andrew Axton & Son Co. of West Brownsville, Pennsylvania, for the Pittsburgh, Brownsville and Geneva Packet Company. She was named for ship captain Isaac C. Woodward. ''I. C ...

'', ''Cruiser'', ''Volunteer'', ''A. R. Budd'', ''J. C. Risher'', ''Clyde'', ''Rival'', ''Voyager'', ''Jim Brown'', ''Rover'', ''Charlie Clarke'', ''Robt. J. Jenkins'', ''Slipper'', ''Bertha'', ''Midland'' ''Sam Barnum'', ''Cadet'', ''Twilight'', and ''Troubadour''.

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 a total area of , of which is land and (1.9%) is water. Three major rivers traverse Allegheny County: the

and the

Monongahela River The Monongahela River ( , )—often referred to locally as the Mon ()—is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed August 15, 2011 river on the Allegheny Plateau in North Cen ...

converge at Downtown Pittsburgh to form the

. The

Youghiogheny River The Youghiogheny River , or the Yough (pronounced Yok ) for short, is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed August 15, 2011 tributary of the Monongahela River in the U.S. s ...

flows into the Monongahela River at McKeesport, to the southeast. There are several islands in these courses. The rivers drain via the

Mississippi River The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it f ...

into the

Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ...

. Although the county's industrial growth resulted in

clearcutting Clearcutting, clearfelling or clearcut logging is a forestry/ logging practice in which most or all trees in an area are uniformly cut down. Along with shelterwood and seed tree harvests, it is used by foresters to create certain types of fore ...

of the area's forests at one time, there has been regrowth and a significant woodland remains.

Adjacent counties

* Butler County (north) * Armstrong County (northeast) * Beaver County (northwest) * Westmoreland County (east and south) * Washington County (southwest)

Major roads and highways

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Climate

Allegheny has a

humid continental climate A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers and freezing ...

which is hot-summer (''Dfa'') except in higher areas where it is warm-summer (''Dfb'').

Law and government

Until January 1, 2000, Allegheny County's government was defined under Pennsylvania's Second Class County Code. The county government was charged with all local activities, including elections, prisons, airports, public health, and city planning. All public offices were headed by elected citizens. There were three elected county commissioners. On January 1, 2000, the Home-Rule Charter went into effect. It replaced the three elected commissioners with an elected chief officer (the County Executive), a county council with 15 members (13 elected by district, two elected county-wide), and an appointed county manager. The changes were intended to maintain a separation of powers between the executive and legislative branches while providing greater citizen control. Allegheny County Medical Examiner jeh

The county has 130 self-governing municipalities, the most in the state. ( Luzerne is second with 76). The county has one Second Class City (Pittsburgh) and three Third Class Cities ( Clairton, Duquesne, and McKeesport). A 2004 study found the county would be better served by consolidating the southeastern portion of the county (which includes many small communities with modest economies) into a large municipality ("Rivers City") with a combined population of approximately 250,000.

County Executive

* Rich Fitzgerald (D)

County Council

* Bethany Hallam (D), At-large * Tom Baker (R), District 1 * Cindy Kirk (R), District 2 * Anita Prizio (D), District 3 * Patrick Catena (D), President, District 4 * Tom Duerr (D), District 5 * John F. Palmiere (D), District 6 * Nicholas Futules (D), District 7 * Paul Zavarella (D), District 8 * Robert J. Macey (D), Vice President, District 9 * DeWitt Walton (D), District 10, * Paul Klein (D), District 11 * Robert Palmosina (D), District 12 * Olivia Bennett (D), District 13 * Samuel DeMarco III (R), At-large

Other elected county offices

* Controller, Corey O'Connor (D) * District Attorney,

Stephen A. Zappala Jr. Stephen A. Zappala Jr. is a Democratic politician and attorney who is the District Attorney of Allegheny County, Pennsylvania. Family Zappala is the son of Phyllis Zappala (née Koleno) and Stephen Zappala Sr., a former Justice of the Pennsylvan ...

(D) * Sheriff, Kevin M. Kraus (D) * Treasurer, John K. Weinstein (D)

Politics

there were 939,382 registered voters in the county; a majority were Democrats. There were 534,214 registered Democrats, 264,193 registered

Republicans Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...

, 98,958 registered as independents and 42,017 registered with other parties. The Republican Party had been historically dominant in county-level politics in the 19th and early 20th centuries; prior to the

Great Depression The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagio ...

, Pittsburgh and Allegheny County had been majority Republican. Since the Great Depression on the state and national levels, the Democratic Party has been dominant in county-level politics. It is by far the most Democratic county in western Pennsylvania. For much of the time between the Great Depression and the turn of the millennium, it was the second-strongest Democratic bastion in Pennsylvania, behind only Philadelphia. In 2000, Democrat

Al Gore Albert Arnold Gore Jr. (born March 31, 1948) is an American politician, businessman, and environmentalist who served as the 45th vice president of the United States from 1993 to 2001 under President Bill Clinton. Gore was the Democratic Part ...

won 56% of the vote and Republican

George W. Bush George Walker Bush (born July 6, 1946) is an American politician who served as the 43rd president of the United States from 2001 to 2009. A member of the Republican Party, Bush family, and son of the 41st president George H. W. Bush, he ...

won 41%. In 2004, Democrat

John Kerry John Forbes Kerry (born December 11, 1943) is an American attorney, politician and diplomat who currently serves as the first United States special presidential envoy for climate. A member of the Forbes family and the Democratic Party (Unite ...

received 57% of the vote and Republican Bush received 41%. In 2006, Democrats Governor Ed Rendell and Senator Bob Casey, Jr. won 59% and 65% of the vote in Allegheny County, respectively. In 2008, Democrat

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, Obama was the first African-American president of the U ...

received 57% of the vote,

John McCain John Sidney McCain III (August 29, 1936 – August 25, 2018) was an American politician and United States Navy officer who served as a United States senator from Arizona from 1987 until his death in 2018. He previously served two terms ...

received 41%, and each of the three state row office winners (

Rob McCord Robert Maxwell McCord (born March 5, 1959) is an American former politician and convicted felon. A member of the Democratic Party, he served as the Treasurer of Pennsylvania from 2009 to 2015. He was an unsuccessful candidate for the Democratic n ...

for Treasurer, Jack Wagner for Auditor General, and Tom Corbett for Attorney General) also carried Allegheny. In 2016, despite

Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of Pe ...

being the first Republican to carry Pennsylvania since 1988,

Hillary Clinton Hillary Diane Rodham Clinton ( Rodham; born October 26, 1947) is an American politician, diplomat, and former lawyer who served as the 67th United States Secretary of State for President Barack Obama from 2009 to 2013, as a United States sen ...

did slightly better than Barack Obama's 2012 vote total while Donald Trump was the worst performing Republican in 20 years. In the

2018 Midterms The 2018 United States elections were held on Tuesday, November 6, 2018. These midterm elections occurred during Republican Donald Trump's term. Democrats made a net gain of 41 seats in the United States House of Representatives, gaining a majo ...

, Democrats received an even higher percentage of the vote with

Tom Wolf Thomas Westerman Wolf (born November 17, 1948) is an American politician and businessman serving as the 47th governor of Pennsylvania since 2015. A member of the Democratic Party, he defeated Republican incumbent Tom Corbett in the 2014 guber ...

and Bob Casey receiving approximately two thirds of the county's vote. This is an improvement over the approximately 55% each person received in the county in their last election in 2014 and 2012 respectively. In 2020, Joe Biden improved upon Clinton's performance, receiving the highest vote percentage for a Democrat since Michael Dukakis in 1988 and the most votes for a Democrat since LBJ in 1964.

State representatives

Source * Robert F. Matzie, Democratic, 16th district *

vacant Within the context of building construction and building codes, "occupancy" refers to the use, or intended use, of a building, or portion of a building, for the shelter or support of persons, animals or property. A closely related meaning is th ...

., Democratic, 19th district * Emily Kinkead, Democratic, 20th district *

Sara Innamorato Sara G. Innamorato is an American politician who was elected to the Pennsylvania House of Representatives in 2018 and is the Representative for the 21st district, which includes parts of Pittsburgh and the surrounding area. Early life and educ ...

, Democratic, 21st district *

Dan Frankel Dan Frankel may refer to: *Dan Frankel (British politician) (1900–1988), MP for Mile End, 1935–1945 *Dan Frankel (American politician) Dan B. Frankel (born April 11, 1956) is a Democratic member of the Pennsylvania House of Representatives ...

, Democratic, 23rd district *

, Democratic, 24th district * Brandon Markosek, Democratic, 25th district * Daniel J. Deasy, Democratic, 27th district *

Rob Mercuri Rob Mercuri (born c. 1982) is an American politician. He has served as a member of the Pennsylvania House of Representatives since 2021, representing District 28. Early life and career Mercuri was raised in West Deer Township, and attended Dee ...

, Republican, 28th district *

Lori Mizgorski Lori A. Mizgorski (née Voegtly; c. 1967–) is an American politician who currently represents the 30th Legislative District in the Pennsylvania House of Representatives. She is a Republican. Early life and education Mizgorski is a native of ...

, Republican, 30th district *

Anthony M. DeLuca Anthony M. DeLuca Sr. (June 3, 1937 – October 9, 2022) was an American politician of the Democratic Party. A longtime resident of the Pittsburgh suburb of Penn Hills, he was a member of the Pennsylvania House of Representatives for the 32nd ...

, Democratic, 32nd district * Carrie DelRosso, Republican, 33rd district *

Summer Lee Summer Lynn Lee (born November 26, 1987) is an American politician and community organizer serving as the U.S. representative for Pennsylvania's 12th congressional district since 2023. A member of the Democratic Party, Lee served as a member of t ...

, Democratic, 34th district * Austin Davis, Democratic, 35th district *

Jessica Benham Jessica L. Benham (born December 13, 1990) is an American politician and disability rights activist serving as a member of the Pennsylvania House of Representatives for the 36th District. She is the first openly LGBTQ+ woman and first openly aut ...

, Democratic, 36th district *

Nick Pisciottano Nickolas R. Pisciottano (born January 12, 1990) is an American elected official serving as a member of the Pennsylvania House of Representatives for the 38th legislative district which includes nine municipalities across the Monongahela Valley ...

, Democratic, 38th district *

Mike Puskaric Michael J. Puskaric (born May 8, 1989) is an American politician who represented the 39th District in the Pennsylvania House of Representatives from 2019 to 2022. Early life Puskaric was born on May 8, 1989, in Allegheny County, Pennsylvania ...

, Republican, 39th district *

Natalie Mihalek Natalie Nichole Mihalek is an American politician. She is a Republican representing District 40 in the Pennsylvania House of Representatives. Early life Mihalek served in the United States Navy from 1997 to 2000. Aftwards, she earned a Bachelo ...

, Republican, 40th district * Dan L. Miller, Democratic, 42nd district * Valerie Gaydos, Republican, 44th district *

Anita Astorino Kulik Anita Astorino Kulik (born May 5, 1964) is an American politician who has served in the Pennsylvania House of Representatives from the 45th district since 2017. Kulik attended Bishop Canevin High School Bishop Canevin High School is a Jesuit- ...

, Democratic, 45th district * Jason Ortitay, Republican, 46th district *

Bob Brooks Bob Brooks (26 December 1927 – September 2012) was an American film director, photographer and advertising creative. He created numerous advertising campaigns, directed several thousand TV commercials in the UK, US and Europe, and directed ...

, Republican, 54th district

State senators

Devlin Robinson Devlin J. Robinson is an American businessman and politician who is the Pennsylvania State Senator for the 37th district. A Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a ...

, Republican, 37th district *

Lindsey Williams Lindsey Marie Williams is an American politician. She is a Democratic member of the Pennsylvania State Senate, representing the 38th district. Education Williams earned a BA in political science from Dickinson College and a JD from Duquesne ...

, Democrat, 38th district *

Wayne D. Fontana Wayne D. Fontana (born March 12, 1950) is an American politician who served as a Democratic member of the Pennsylvania State Senate, representing the 42nd District since 2005. Background Fontana was born and raised in the Beechview section ...

, Democrat, 42nd district *

Jay Costa Jay Costa (born November 17, 1957) is an American politician, currently serving as a member of the Pennsylvania State Senate who has represented the 43rd District since 1996. On November 17, 2010, Senate Democrats elected Costa as their new f ...

, Democrat, 43rd district * James Brewster, Democrat, 45th district

U.S. representatives

* Conor Lamb, Democrat, 17th district *

Mike Doyle Michael, Mick or Mike Doyle may refer to: Politics *Michael Doyle (Irish politician), Irish Farmers' Party politician from Wexford, TD from 1922 to 1927 *Michael Doyle, alleged member of the Molly Maguires *Mike Doyle (American politician) (born 1 ...

, Democrat, 18th district

Religion

In 2010 statistics, the largest religious group in Allegheny County was the Diocese of Pittsburgh, with 460,672 Catholics worshipping at 179 parishes, followed by 44,204 UMC Methodists with 100 congregations, 42,838 PC-USA Presbyterians with 145 congregations, 33,103

non-denominational A non-denominational person or organization is one that does not follow (or is not restricted to) any particular or specific religious denomination. Overview The term has been used in the context of various faiths including Jainism, Baháʼí Fait ...

adherents with 85 congregations, 24,718 ELCA Lutherans with 77 congregations, 17,148 ABCUSA Baptists with 42 congregations, 12,398 AoG Pentecostals with 30 congregations, 8,483 Reform Jews with 6 congregations, 7,780 TEC Episcopalians with 19 congregations, and 6,700

Hindus Hindus (; ) are people who religiously adhere to Hinduism.Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pages 35–37 Historically, the term has also been used as a geographical, cultural, and later religious identifier for ...

with four

temples A temple (from the Latin ) is a building reserved for spiritual rituals and activities such as prayer and sacrifice. Religions which erect temples include Christianity (whose temples are typically called churches), Hinduism (whose temples ...

. Altogether, 60.6% of the population was claimed as members by religious congregations, although members of historically African-American denominations were underrepresented due to incomplete information. In 2014, Allegheny County had 794 religious organizations, the 11th most out of all US counties.

Demographics

As of the 2010 census, there were 1,223,348 people living in the county. The population density was 1676 people per square mile (647/km²). The racial makeup of the county was 82.87%

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 on ...

, 14.39%

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 have o ...

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 ...

, 2.94%

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 ...

, 0.03%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe the original p ...

, 0.37% from other races, and 1.40% from two or more races. About 1.31% of the population were

Hispanic The term ''Hispanic'' ( es, hispano) refers to people, Spanish culture, 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 Vic ...

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. At the

census A census is the procedure of systematically acquiring, recording and calculating information about the members of a given population. This term is used mostly in connection with national population and housing censuses; other common censuses incl ...

of 2000, there were 1,281,666 people, 537,150 households, and 332,495 families living in the county. The population density was 1,755 people per square mile (678/km²). There were 583,646 housing units at an average density of 799 per square mile (309/km²). The racial makeup of the county was 84.33%

, 12.41%

, 0.12% Native American, 1.69%

, 0.03%

, 0.34% from other races, and 1.07% from two or more races. About 0.87% of the population were

of any race. 20.0% were of

German German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...

, 15.0% Italian, 12.7% Irish, 7.5%

Polish Polish may refer to: * Anything from or related to Poland, a country in Europe * Polish language * Poles, people from Poland or of Polish descent * Polish chicken *Polish brothers (Mark Polish and Michael Polish, born 1970), American twin screenwr ...

and 5.1% English ancestry according to Census 2000. 93.5% spoke English and 1.3% Spanish as their first language. There were 537,150 households, out of which 26.40% had children under the age of 18 living with them, 46.10% were married couples living together, 12.40% had a female householder with no husband present, and 38.10% were non-families. Some 32.70% of all households were made up of individuals, and 13.20% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.96. The age distribution of the population shows 21.90% under the age of 18, 8.50% from 18 to 24, 28.30% from 25 to 44, 23.40% from 45 to 64, and 17.80% who were 65 years of age or older. The median age was 40. For every 100 females, there were 90.00 males; for every 100 females age 18 and over, there were 86.20 males.

2020 Census

Economy

In the late 18th century

farming 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 to ...

played a critical role in the growth of the area. There was a surplus of grain due to transportation difficulties in linking with the eastern portion of the state. As a result, the farmers distilled the grain into

, which significantly helped the farmers financially. The area quickly became a key manufacturing area in the young nation. Coupled with deposits of iron and coal, and the easy access to waterways for

barge Barge nowadays generally refers to a flat-bottomed inland waterway vessel which does not have its own means of mechanical propulsion. The first modern barges were pulled by tugs, but nowadays most are pushed by pusher boats, or other vessels ...

traffic, the city quickly became one of the most important steel producing areas in the world. Based on 2007 data from the US Army Corps of Engineers, Pittsburgh is the second (after

Laredo, Texas Laredo ( ; ) is a city in and the county seat of Webb County, Texas, United States, on the north bank of the Rio Grande in South Texas, across from Nuevo Laredo, Tamaulipas, Mexico. Laredo has the distinction of flying seven flags (the flag of t ...

) busiest inland port in the nation. US steel production declined late in the 20th century, and Allegheny County's economy began a shift to other industries. It is presently known for its hospitals, universities, and industrial centers. Despite the decline of heavy industry, Pittsburgh is home to a number of major companies and is ranked in th
top ten
among US cities hosting headquarters of Fortune 500 corporations, including

U.S. Steel United States Steel Corporation, more commonly known as U.S. Steel, is an American integrated steel producer headquartered in Pittsburgh, Pittsburgh, Pennsylvania, with production operations primarily in the United States of America and in severa ...

Corporation,

PNC Financial Services The PNC Financial Services Group, Inc. (stylized as PNC) is an American bank holding company and financial services corporation based in Pittsburgh, Pennsylvania. Its banking subsidiary, PNC Bank, operates in 27 U.S. state, states and the D ...

Group,

PPG Industries PPG Industries, Inc. is an American Fortune 500 company and global supplier of paints, coatings, and specialty materials. With headquarters in Pittsburgh, Pennsylvania, PPG operates in more than 70 countries around the globe. By revenue it is ...

, and H. J. Heinz Company. The county leads the state in number of defense contractors supplying the U.S. military.

Regions

* East Hills * North Hills * South Hills * West Hills (Pennsylvania), West Hills * Pittsburgh, City of Pittsburgh

Education

Colleges and universities

* Byzantine Catholic Seminary of SS. Cyril and Methodius * Carlow University * Carnegie Mellon University * Chatham University * DeVry University * Duquesne University * La Roche College * Penn State Greater Allegheny * Pittsburgh Theological Seminary * Point Park University * Reformed Presbyterian Theological Seminary * Robert Morris University * University of Pittsburgh

Community, junior and technical colleges

* Bidwell Training Center * Community College of Allegheny County * Empire Beauty Schools * Fountain of Youth Academy of Cosmetology * Institute of Medical and Business Careers * North Hills Beauty Academy * Pittsburgh Career Institute * Pittsburgh Institute of Aeronautics * Pittsburgh Institute of Mortuary Science * Pittsburgh Multicultural Cosmetology Academy * Pittsburgh Technical College * Rosedale Technical College * South Hills Beauty Academy * Triangle Tech * Vet Tech Institute

Public school districts

Map of Allegheny County Pennsylvania School Districts

School districts include:

Approved private schools

These private schools provide special education for disabled students: * ACLD Tillotson School, Pittsburgh * The Day School at The Children's Institute, Pittsburgh * DePaul School for Hearing and Speech, Pittsburgh * Easter Seal Society of Western Pennsylvania * The Education Center at the Watson Institute, Sewickley * Pace School, Pittsburgh * Pressley Ridge Day School, Pittsburgh * Pressley Ridge School for the Deaf, Pittsburgh * The Watson Institute Friendship Academy, Pittsburgh * Wesley Spectrum Highland Services, Pittsburgh * Western Pennsylvania School for Blind Children, Pittsburgh * Western Pennsylvania School for the Deaf, Pittsburgh

Private high schools

* Bishop Canevin High School * Central Catholic High School (Pittsburgh, Pennsylvania), Central Catholic High School * Wilson Christian Academy, Cornerstone Christian Preparatory Academy * Eden Christian Academy * The Ellis School * Hillcrest Christian Academy * Harvest Baptist Academy * Imani Christian Academy * Oakland Catholic High School * Our Lady of the Sacred Heart High School (Coraopolis), Our Lady of the Sacred Heart High School * Serra Catholic High School * Seton-La Salle Catholic High School * Sewickley Academy * Shady Side Academy * St. Joseph High School (Natrona Heights, Pennsylvania), St. Joseph High School * Vincentian Academy * Winchester Thurston School

Transportation

Allegheny County's public transportation provider is Pittsburgh Regional Transit. The Allegheny County Department of Public Works oversees infrastructure, maintenance, and engineering services in the county. The Three Rivers Heritage Trail provides uninterrupted bicycle and pedestrian connections along the three rivers in the city, and the Great Allegheny Passage trail runs from downtown Pittsburgh to Washington, D.C. The Allegheny County Airport is the original airport for Pittsburgh and houses a number of flight schools, charter flight operations, and medevac operations.

Major roadways

Interstate 79 in Pennsylvania, Interstate 79 runs north to south from Warrendale, Pennsylvania, Warrendale to Bridgeville, Pennsylvania, Bridgeville * I-279 (PA)

Interstate 279 runs north to south from Franklin Park, Pennsylvania, Franklin Park to Downtown * I-579 (PA)

Interstate 579 (Crosstown Boulevard), from Interstate 279 on the north shore to Liberty Bridge (Pittsburgh), Liberty Bridge / Boulevard of the Allies * I-76 (PA)

Interstate 76 (Pennsylvania), Interstate 76 / Pennsylvania Turnpike, PA Turnpike runs east to west from Interstate 376 in Monroeville, Pennsylvania, Monroeville to the Warrendale, Pennsylvania, Warrendale interchange (at Interstate 79 in Pennsylvania, Interstate 79) * I-376 (PA)

Interstate 376 runs east to west from Interstate 76 (Pennsylvania), Interstate 76 in Monroeville, Pennsylvania, Monroeville across the county to Pittsburgh International Airport and beyond * Turnpike-576

Pennsylvania Route 576, Pennsylvania Turnpike 576 (future I-576) runs south from Interstate 376 at the Pittsburgh International Airport to US Route 22, also called the Findlay Connector. The next phase of this road extension, from US Route 22 to Interstate 79 in Pennsylvania, Interstate 79 running along the County line, is currently under construction and is expected to be open to traffic in 2020. * US 19

US Route 19 runs north to south from Warrendale, Pennsylvania, Warrendale to Upper St. Clair, Pennsylvania, Upper St. Clair * US 22

US Route 22 runs west to east, along much of US Route 30 and Interstate 376, from Imperial, Pennsylvania, Imperial to Monroeville, Pennsylvania, Monroeville * US 30

US Route 30 runs west to east from Clinton, Pennsylvania, Clinton to North Versailles Township, Allegheny County, Pennsylvania, North Versailles, joining US Route 22, US 22 and Interstate 376 south of the Pittsburgh International Airport and leaving those same two routes in Wilkinsburg, Pennsylvania, Wilkinsburg For information about major state roads, see list of State Routes in Allegheny County, Pennsylvania and Allegheny County Belt System.

Parks and recreation

There are two List of Pennsylvania state parks, Pennsylvania state parks in Allegheny County. Point State Park is at the confluence of the Allegheny and Monongahela rivers in Downtown Pittsburgh, and Allegheny Islands State Park is in the

in Harmar Township, Allegheny County, Pennsylvania, Harmar Township and is undeveloped as of August 2010. Pennsylvania State Game Lands Number 203 is also located in Allegheny County providing hunting and other activities.

Sports

* Pittsburgh Steelers, American football, football team * Pittsburgh Penguins, ice hockey team * Pittsburgh Pirates, baseball team * Pittsburgh Riverhounds, Association football, soccer team * Pittsburgh Passion, Women's Football Alliance team * Pittsburgh Thunderbirds, American Ultimate Disc League team * Steel City Roller Derby, Women's Flat Track Derby Association team

Communities

Map of Allegheny County Pennsylvania With Municipal and Township Labels

Under Pennsylvania law, there are four types of incorporated municipalities: List of cities in Pennsylvania, cities, List of towns and boroughs in Pennsylvania, boroughs, List of townships in Pennsylvania, townships, and (in one case) a List of towns and boroughs in Pennsylvania#Towns, town. The following municipalities are in Allegheny County:

Cities

* Clairton * Duquesne * McKeesport *

(county seat)

Boroughs

* Aspinwall, Pennsylvania, Aspinwall * Avalon, Pennsylvania, Avalon * Baldwin, Allegheny County, Pennsylvania, Baldwin * Bell Acres, Pennsylvania, Bell Acres * Bellevue, Pennsylvania, Bellevue * Ben Avon, Allegheny County, Pennsylvania, Ben Avon * Ben Avon Heights, Pennsylvania, Ben Avon Heights * Bethel Park, Pennsylvania, Bethel Park * Blawnox, Pennsylvania, Blawnox * Brackenridge, Pennsylvania, Brackenridge * Braddock, Allegheny County, Pennsylvania, Braddock * Braddock Hills, Pennsylvania, Braddock Hills * Bradford Woods, Pennsylvania, Bradford Woods * Brentwood, Pennsylvania, Brentwood * Bridgeville, Pennsylvania, Bridgeville * Carnegie, Pennsylvania, Carnegie * Castle Shannon, Pennsylvania, Castle Shannon * Chalfant, Pennsylvania, Chalfant * Cheswick, Pennsylvania, Cheswick * Churchill, Pennsylvania, Churchill * Coraopolis, Pennsylvania, Coraopolis * Crafton, Pennsylvania, Crafton * Dormont, Pennsylvania, Dormont * Dravosburg, Pennsylvania, Dravosburg * East McKeesport, Pennsylvania, East McKeesport * East Pittsburgh, Pennsylvania, East Pittsburgh * Edgewood, Allegheny County, Pennsylvania, Edgewood * Edgeworth, Pennsylvania, Edgeworth * Elizabeth, Pennsylvania, Elizabeth * Emsworth, Pennsylvania, Emsworth * Etna, Pennsylvania, Etna * Forest Hills, Pennsylvania, Forest Hills * Fox Chapel, Pennsylvania, Fox Chapel * Franklin Park, Pennsylvania, Franklin Park * Glassport, Pennsylvania, Glassport * Glen Osborne, Pennsylvania, Glen Osborne * Glenfield, Pennsylvania, Glenfield * Green Tree, Pennsylvania, Green Tree * Haysville, Pennsylvania, Haysville * Heidelberg, Pennsylvania, Heidelberg * Homestead, Pennsylvania, Homestead * Ingram, Pennsylvania, Ingram * Jefferson Hills, Pennsylvania, Jefferson Hills * Leetsdale, Pennsylvania, Leetsdale * Liberty, Allegheny County, Pennsylvania, Liberty * Lincoln, Pennsylvania, Lincoln * McDonald, Pennsylvania, McDonald (mostly in Washington County) * McKees Rocks, Pennsylvania, McKees Rocks * Millvale, Pennsylvania, Millvale * Monroeville, Pennsylvania, Monroeville * Mount Oliver, Pennsylvania, Mount Oliver * Munhall, Pennsylvania, Munhall * North Braddock, Pennsylvania, North Braddock * Oakdale, Pennsylvania, Oakdale * Oakmont, Pennsylvania, Oakmont * Pennsbury Village, Pennsylvania, Pennsbury Village * Pitcairn, Pennsylvania, Pitcairn * Pleasant Hills, Pennsylvania, Pleasant Hills * Plum, Pennsylvania, Plum * Port Vue, Pennsylvania, Port Vue * Rankin, Pennsylvania, Rankin * Rosslyn Farms, Pennsylvania, Rosslyn Farms * Sewickley, Pennsylvania, Sewickley * Sewickley Heights, Pennsylvania, Sewickley Heights * Sewickley Hills, Pennsylvania, Sewickley Hills * Sharpsburg, Pennsylvania, Sharpsburg * Springdale, Pennsylvania, Springdale * Swissvale, Pennsylvania, Swissvale * Tarentum, Pennsylvania, Tarentum * Thornburg, Pennsylvania, Thornburg * Trafford, Pennsylvania, Trafford (mostly in Westmoreland County) * Turtle Creek, Pennsylvania, Turtle Creek * Verona, Pennsylvania, Verona * Versailles, Pennsylvania, Versailles * Wall, Pennsylvania, Wall * West Elizabeth, Pennsylvania, West Elizabeth * West Homestead, Pennsylvania, West Homestead * West Mifflin, Pennsylvania, West Mifflin * West View, Pennsylvania, West View * Whitaker, Pennsylvania, Whitaker * White Oak, Pennsylvania, White Oak * Whitehall, Allegheny County, Pennsylvania, Whitehall * Wilkinsburg, Pennsylvania, Wilkinsburg * Wilmerding, Pennsylvania, Wilmerding

Townships

* Aleppo Township, Allegheny County, Pennsylvania, Aleppo * Baldwin Township, Allegheny County, Pennsylvania, Baldwin * Collier Township, Allegheny County, Pennsylvania, Collier * Crescent Township, Allegheny County, Pennsylvania, Crescent * East Deer Township, Allegheny County, Pennsylvania, East Deer * Elizabeth Township, Allegheny County, Pennsylvania, Elizabeth * Fawn Township, Allegheny County, Pennsylvania, Fawn * Findlay Township, Allegheny County, Pennsylvania, Findlay * Forward Township, Allegheny County, Pennsylvania, Forward * Frazer Township, Allegheny County, Pennsylvania, Frazer * Hampton Township, Allegheny County, Pennsylvania, Hampton * Harmar Township, Allegheny County, Pennsylvania, Harmar * Harrison Township, Allegheny County, Pennsylvania, Harrison * Indiana Township, Allegheny County, Pennsylvania, Indiana * Kennedy Township, Allegheny County, Pennsylvania, Kennedy * Kilbuck Township, Allegheny County, Pennsylvania, Kilbuck * Leet Township, Allegheny County, Pennsylvania, Leet * Marshall Township, Allegheny County, Pennsylvania, Marshall * McCandless Township, Allegheny County, Pennsylvania, McCandless * Moon Township, Allegheny County, Pennsylvania, Moon * Mt. Lebanon Township, Allegheny County, Pennsylvania, Mt. Lebanon * Neville Township, Allegheny County, Pennsylvania, Neville * North Fayette Township, Allegheny County, Pennsylvania, North Fayette * North Versailles Township, Allegheny County, Pennsylvania, North Versailles * O'Hara Township, Allegheny County, Pennsylvania, O'Hara * Ohio Township, Allegheny County, Pennsylvania, Ohio * Penn Hills Township, Allegheny County, Pennsylvania, Penn Hills * Pine Township, Allegheny County, Pennsylvania, Pine * Reserve Township, Allegheny County, Pennsylvania, Reserve * Richland Township, Allegheny County, Pennsylvania, Richland * Robinson Township, Allegheny County, Pennsylvania, Robinson * Ross Township, Allegheny County, Pennsylvania, Ross * Scott Township, Allegheny County, Pennsylvania, Scott * Shaler Township, Allegheny County, Pennsylvania, Shaler * South Fayette Township, Allegheny County, Pennsylvania, South Fayette * South Park Township, Allegheny County, Pennsylvania, South Park * South Versailles Township, Allegheny County, Pennsylvania, South Versailles * Springdale Township, Allegheny County, Pennsylvania, Springdale * Stowe Township, Allegheny County, Pennsylvania, Stowe * Upper St. Clair Township, Allegheny County, Pennsylvania, Upper Saint Clair * West Deer Township, Allegheny County, Pennsylvania, West Deer * Wilkins Township, Allegheny County, Pennsylvania, Wilkins

Census-designated places

Census-designated places are geographical areas designated by the United States Census Bureau, US Census Bureau for the purposes of compiling demographic data. They are not actual jurisdictions under Pennsylvania law. Other unincorporated communities, such as villages, may be listed here as well. * Allison Park, Pennsylvania, Allison Park * Bairdford, Pennsylvania, Bairdford * Bakerstown, Pennsylvania, Bakerstown * Boston, Pennsylvania, Boston * Carnot-Moon, Pennsylvania, Carnot-Moon * Clinton, Pennsylvania, Clinton * Curtisville, Pennsylvania, Curtisville * Enlow, Pennsylvania, Enlow * Gibsonia, Pennsylvania, Gibsonia * Glenshaw, Pennsylvania, Glenshaw * Greenock, Pennsylvania, Greenock * Harwick, Pennsylvania, Harwick * Imperial, Pennsylvania, Imperial * Noblestown, Pennsylvania, Noblestown * Rennerdale, Pennsylvania, Rennerdale * Russellton, Pennsylvania, Russellton * Sturgeon, Pennsylvania, Sturgeon

Unincorporated communities

* Acmetonia, Pennsylvania, Acmetonia * Blackridge, Pennsylvania, Blackridge * Blanchard, Allegheny County, Pennsylvania, Blanchard * Broughton, Pennsylvania, Broughton * Bruceton, Pennsylvania, Bruceton * Buena Vista, Pennsylvania, Buena Vista * Creighton, Pennsylvania, Creighton * Cubbage Hill, Pennsylvania, Cubbage Hill * Cuddy, Pennsylvania, Cuddy * Dorseyville, Pennsylvania, Dorseyville * Ewingsville, Pennsylvania, Ewingsville * Harmarville, Pennsylvania, Harmarville * Indianola, Pennsylvania, Indianola * Ingomar, Pennsylvania, Ingomar * Karns, Pennsylvania, Karns * Keown Station, Pennsylvania, Keown Station * Kirwan Heights, Pennsylvania, Kirwan Heights * Library, Pennsylvania, Library * McKnight, Pennsylvania, McKnight * Moon Run, Pennsylvania, Moon Run * Mount Vernon, Pennsylvania, Mount Vernon * Natrona, Pennsylvania, Natrona * Natrona Heights, Pennsylvania, Natrona Heights * Nevillewood, Pennsylvania, Nevillewood * Presto, Pennsylvania, Presto * Regent Square (Pittsburgh), Regent Square * Rural Ridge, Pennsylvania, Rural Ridge * Sheraden, Pennsylvania, Sheraden * Warrendale, Pennsylvania, Warrendale * Wexford, Pennsylvania, Wexford * Wildwood, Pennsylvania, Wildwood

Former places

Many political subdivisions of Allegheny County have come and gone through subdivision or annexation through the years. These include: * Allegheny, Pennsylvania, Allegheny City – the area that is now the North Shore (or North Side) of the City of Pittsburgh, north of the Allegheny River. * Allentown Borough – now the neighborhood of Allentown in Pittsburgh. * Birmingham, Allegheny County, Pennsylvania, Birmingham Borough – what is now Pittsburgh's South Side. * Brushton Borough * Carrick Borough – now the neighborhood of Carrick. Formed out of Baldwin Township in 1904, this borough existed until it was annexed by Pittsburgh in 1927. It was named for Carrick-on-Suir, Ireland. Some of the area's manhole covers still bear the Carrick Borough name. * Chartier Township – existed at the time of the 1860 U.S. Federal Census. * Collins Township, Allegheny County, Pennsylvania, Collins Township – in what is now the northeast part of the City of Pittsburgh, east of Lawrenceville and north of Penn Avenue. * Knoxville Borough * Lawrenceville Borough * McClure Township, Allegheny County, Pennsylvania, McClure Township – McClure was formed in 1858 from the section of Ross Township adjacent to Allegheny City. In 1867 McClure, along with sections of Reserve Township, was incorporated into Allegheny City. The McClure section of this annexation became Wards 9 (Woods Run Area) and 11 (present-day Brighton Heights) in the City of Pittsburgh. * Mifflin Township- comprised the modern day communities of Whitaker, West Mifflin, West Homestead, West Elizabeth, Pleasant Hills, Munhall, Lincoln Place, Jefferson Hills, Homestead, Hays, Duquesne, Dravosburg, Clairton and part of Baldwin. * Patton Township – was in the east-central part of the county, north of North Versailles Township, east of Wilkins and Penn Townships, and south of Plum Township. In the U.S. census for 1860–1880. In 1951 it became incorporated as the borough of Monroeville, Pennsylvania, Monroeville. * Northern Liberties Borough – in what is now the Strip District, Pittsburgh, Strip District of Pittsburgh. The borough was annexed to Pittsburgh in 1837 as the first addition to the city's original territory. * Peebles Township, Allegheny County, Pennsylvania, Peebles Township – included most of what is now the eastern part of the city of Pittsburgh from the Monongahela River in the south (today's Hazelwood (Pittsburgh), Hazelwood) to the Allegheny River in the north. It was subdivided into Collins and Liberty Township, Allegheny County, Pennsylvania, Liberty townships, all of which were incorporated into Pittsburgh in 1868. * Pitt Township, Allegheny County, Pennsylvania, Pitt Township * St. Clair Township, Allegheny County, Pennsylvania, St. Clair Township – stretched from the Monongahela River south to the Washington County line. It divided into Lower St. Clair Township, Allegheny County, Pennsylvania, Lower St. Clair, which eventually became part of the City of Pittsburgh, Dormont, Mount Lebanon, and Upper St. Clair. * Snowden – now known as South Park Township. * Sterrett Township * Temperanceville – what is now Pittsburgh's West End. * Union Borough – the area surrounding Temperanceville. * West Liberty, Allegheny County, Pennsylvania, West Liberty Borough – now the neighborhoods of Brookline and Beechview in Pittsburgh.

Population ranking

The population ranking of the following table is based on the 2010 United States census, 2010 census of Allegheny County. † ''county seat''

Notes

References

External links

Allegheny County official website

Allegheny County Quest

County Map by Municipality

Historic Pittsburgh Map Collection

Southwestern Pennsylvania Commission
{{coord, 40.47, -79.98, display=title, type:adm2nd_region:US-PA_source:UScensus1990 Allegheny County, Pennsylvania, Pennsylvania counties on the Ohio River Pittsburgh metropolitan area 1788 establishments in Pennsylvania Populated places established in 1788 Counties of Appalachia Pennsylvania placenames of Native American origin