Allegheny County

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The Allegheny County Courthouse in Pittsburgh, listed on the NRHP since 1973 [1]
The Allegheny County Courthouse in Pittsburgh, listed on the NRHP since 1973
administration
US state : Pennsylvania
Administrative headquarters : Pittsburgh
Address of the
administrative headquarters: 		Allegheny County Courthouse
436 Grant St
Pittsburgh, PA 15219-2400
Foundation : 1788
Made up from: Washington County
Westmoreland County
Area code : +1 412
Demographics
Residents : 1,223,348  (2010)
Population density : 646.9 inhabitants / km 2
geography
Total area : 1929 km²
Water surface : 38 km²
map
Map of Allegheny County within Pennsylvania
Website : www.county.allegheny.pa.us

The Allegheny County is a county in the US state of Pennsylvania .

At the 2010 census , the county had 1,223,348 residents and a population density of 646.9 people per square kilometer. The county seat is Pittsburgh .

Allegheny County forms the core of the metropolitan area around the city of Pittsburgh .

geography

The county is located in southwest Pennsylvania in the metropolitan area around the city of Pittsburgh at the confluence of the Monongahela River and Allegheny River to the Ohio River . It has an area of ​​1929 km², of which 38 km² are water. The following counties border Allegheny County:

Beaver County Butler County Armstrong County
Neighboring communities Westmoreland County
Washington County

history

The county was formed on September 24, 1788 from former parts of Washington and Westmoreland Counties. It was named after the Allegheny River .

Eleven locations in the county have National Historic Landmark status . 231 structures and sites in the county are listed on the National Register of Historic Places (NRHP) (as of July 18, 2018).

Demographic data

growth of population
Census Residents ± in%
1790 10,203 -
1800 15,087 47.9%
1810 25,317 67.8%
1820 34,921 37.9%
1830 50,552 44.8%
1840 81,235 60.7%
1850 138,290 70.2%
1860 178,831 29.3%
1870 262.204 46.6%
1880 355,869 35.7%
1890 551,959 55.1%
1900 775.058 40.4%
1910 1,018,463 31.4%
1920 1,185,808 16.4%
1930 1,374,410 15.9%
1940 1,411,539 2.7%
1950 1,515,237 7.3%
1960 1,628,587 7.5%
1970 1,605,016 -1.4%
1980 1,450,085 -9.7%
1990 1,336,449 -7.8%
2000 1,281,666 -4.1%
2010 1,223,348 -4.6%
before 1900

1900–1990 2000 2010

The Allegheny County Office Building in Pittsburgh

As of the 2010 census , Allegheny County had 1,223,348 people in 524,584 households. The population density was 646.9 inhabitants per square kilometer.

The racial the population was composed of 81.5 percent white, 13.2 percent African American, 0.1 percent Native American, 2.8 percent Asian and other ethnic groups; 1.8 percent were descended from two or more races. Hispanic or Latino of any race was 1.6 percent of the population.

Statistically speaking, 2.26 people lived in each of the 524,584 households.

19.8 percent of the population were under 18 years old, 63.4 percent were between 18 and 64 and 16.8 percent were 65 years or older. 52.1 percent of the population was female.

The median income for a household was 46,212  USD . The per capita income was $ 28,825. 13.0 percent of the population lived below the poverty line.

cities and communes

Map of Allegheny County

Citys

Boroughs

Census-designated places (CDP)

Unincorporated Communities

1partly in Washington County

Townships

In culture

The plot of the award-winning film Who Goes Through Hell is set in the mining community of the provincial town of Clairton, Allegheny County.

Personalities

Web links

Commons : Allegheny County  - collection of pictures, videos, and audio files

Individual evidence

  1. ↑ Extract from the National Register of Historic Places - No. 73001586. Retrieved October 28, 2011
  2. ^ Allegheny County in the United States Geological Survey's Geographic Names Information System.Retrieved February 22, 2011
  3. ^ National Association of Counties.Retrieved October 28, 2011
  4. ↑ Charles Curry Aiken, Joseph Nathan Kane: The American Counties: Origins of County Names, Dates of Creation, Area, and Population Data, 1950-2010 . 6th edition. Scarecrow Press, Lanham 2013, ISBN 978-0-8108-8762-6 , p. 6 .
  5. ↑ Listing of National Historic Landmarks by State: Pennsylvania . National Park Service , accessed July 20, 2018.
  6. ↑ Search mask database in the National Register Information System. National Park Service , accessed July 18, 2018.
  7. ^ University of Virginia Library - Historical Census Browser. Retrieved October 28, 2011
  8. ^ Extract from Census.gov.Retrieved February 28, 2011
  9. ↑ Excerpt from factfinder.census.gov.Retrieved February 28, 2011
  10. ↑ United States Census 2010.Retrieved October 28, 2011
  11. ^ US Census Bureau, State & County QuickFacts - Allegheny County. Retrieved October 28, 2011

Coordinates: 40 ° 27 ′  N , 80 ° 1 ′  W