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May 17, 2024 · See how the population of Allegheny County changed over the past 12 years by year, race, age, and sex. Compare the county's population with the US total and learn about the data sources and methods.
Allegheny County, Pennsylvania 's estimated 2024 population is 1,217,045 with a growth rate of -0.64% in the past year according to the most recent United States census data. Allegheny County, Pennsylvania is the 2nd largest county in Pennsylvania.
YearPopulationGrowthGrowth Rate20291,178,145-7,780-0.66%20281,185,925-7,780-0.65%20271,193,705-7,780-0.65%20261,201,485-7,780-0.64%Jul 1, 2022 · Population estimates base, April 1, 2020, (V2022) . 1,250,536. Population, percent change - April 1, 2020 (estimates base) to July 1, 2023, (V2023) . -2.1%. Population, percent change - April 1, 2020 (estimates base) to July 1, 2022, (V2022) . -1.4%.
- (800) 923-8282
- 1,713.2
- 1,675.6
- 1,223,348
Allegheny County ( / ˌælɪˈɡeɪni / AL-ig-AY-nee) is a county in Pennsylvania, United States. As of the 2020 census, the population was 1,250,578, making it the state's second-most populous county, after Philadelphia County. Its county seat and most populous city is Pittsburgh, Pennsylvania's second most populous city. [2]
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1,233,253 Population. 730 square miles 1,689.5 people per square mile. Census data: ACS 2022 1-year unless noted. Find data for this place. Hover for margins of error and contextual data. Demographics. Age. 40.7 Median age. about the same as the figure in Pennsylvania: 40.9. a little higher than the figure in United States: 39.
Population, Census, April 1, 2020: 1,250,578: 302,971: 13,002,700: 331,449,281: Population, Census, April 1, 2010: 1,223,348: 305,704: 12,702,379: 308,745,538: Age and Sex
Allegheny County, Pennsylvania - Census Bureau Profile. Share Profile. Display Sources. Allegheny County, Pennsylvania has 730.0 square miles of land area and is the 29th largest county in Pennsylvania by total area.