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Allegheny County, Pennsylvania

Open an interactive map for Allegheny and the surrounding area.

The 2000 Census showed that Allegheny County had a population of 1,279,914 people. This represented 10.42% of the total population of Pennsylvania, making it the state's 2nd most populous county (out of 67 counties).

From the Census estimates for 2008 ^<1>, Allegheny had a population of 1,215,103 people. This is a decrease of 5.06% since the 2000 Census.

The following table shows the recent changes in population. For the years after 2000, the population counts are estimated.

Year	Population	Change Since 2000	Year-to-Year Change
2008	1,215,103	-5.07%	-0.27% since 2007
2007	1,218,429	-4.81%	-0.4% since 2006
2006	1,223,379	-4.42%	-0.75% since 2005
2005	1,232,587	-3.7%	-1.08% since 2004
2004	1,246,004	-2.65%	-0.9% since 2003
2003	1,257,299	-1.77%	-0.65% since 2002
2002	1,265,469	-1.13%	-0.56% since 2001
2001	1,272,576	-0.58%	-0.58% since 2000
---
2000	1,279,959	The Last Census

Allegheny County had 583,646 Housing Units ^<2> at the time of the 2000 Census.

The 2000 Census shows that Allegheny County has a total area ^<3> of 744 square miles [1,928 km²]. Of this total, 730 square miles [1,891 km²] of the area is land, with the balance (1.95%) being water (14.54 square miles [37.65 km²]).

Using the above population and land area values, Allegheny County had a population density of 1,752 people per square mile [676 people/km²], making it the state's 3rd most densely populated county (out of 67 counties).

US Census QuickFacts

The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Allegheny County is available. The QuickFact also contains a comparison between Allegheny and the state of Pennsylvania.

Click here for the Allegheny County QuickFact (QF-42003).

Below are some of the communities that are located in Allegheny County:

Community	Census QuickFact	Population (2008 est)	Population (2000 Census)	Change in Population
Pittsburgh	QF-4261000	310,037	334,563	-7.33%
Monroeville	QF-4250528	27,639	29,349	-5.83%

Below are the counties that adjoin and form the boundaries of Allegheny County. A link to their specific Census QuickFact has been provided.

County	Census QuickFact	Direction	Population (2008 est)	Population (2000 Census)	Change in Population
Armstrong	QF-42005	NE	68,790	72,315	-4.87%
Beaver	QF-42007	NW	172,476	181,115	-4.77%
Butler	QF-42019	N	182,902	174,519	4.8%
Washington	QF-42125	SW	206,407	202,947	1.7%
Westmoreland	QF-42129	E	361,589	369,690	-2.19%

The Commemorative
Quarter for
Pennsylvania ^<4>

Search for Local Businesses

We have prepared the following searches to help you find businesses, travel and vacation activities. It's likely that the search results won't include all of the businesses that are in this area, but the results should give you a good foundation for further searches.

For what it's worth: In addition to helping you submit your own search, clicking 'Other...' will frequently (but not always) show you some popular searches for this area.

If you find an error or your business wasn't included in the results, please contact Google to help them resolve the issue (we simply link to 'Search-by-Location' and have no control over their results).

Other Roadside Stops

About Pennsylvania

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Off-the-Road Links

U.S. Census Bureau

Census QuickFact for Allegheny County

The following websites contain collections of photos taken around Allegheny County:

Flickr.com

Panoramio.com

Looking for more websites and/or information centered on Allegheny? Please visit the Map Page for Allegheny.

Footnotes

<1>	On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census. For more information, please visit the U.S. Census Bureau. - Return to Citation
<2>	A Housing Unit is a broad term for those places where people live, whether occupied or temporarily vacant, such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway). - Return to Citation
<3>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Allegheny. The value given by the Census Bureau reflects their statistical (or sampling) requirements. - Return to Citation
<4>	All Quarter-dollar coin images from the United States Mint. - Return to Citation

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Last Modified: 09 Sep 2009