Allegheny County Demographics

A map of Allegheny County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	934,734	938,252	75.5%	75.0%
Black	152,924	161,554	12.4%	12.9%
Asian	53,578	58,318	4.3%	4.7%
Multiracial	52,662	50,456	4.3%	4.0%
Hispanic	36,691	34,325	3.0%	2.7%
Native American/Other	7,588	7,673	0.6%	0.6%

Allegheny County, Pennsylvania has an estimated population of 1,238,177, a less than 1% change from the 1,250,578 recorded in the 2020 Census. The population is 75.5% White, 12.4% Black, 4.3% Asian, 4.3% Multiracial, 3.0% Hispanic, and 0.6% Native American/Other. This demographic dot map shows the population of Allegheny County, with one dot drawn for each person counted by the Census, color-coded by race.

Allegheny has become slightly less racially diverse since the 2020 Census. It is less diverse than Pennsylvania overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Allegheny County, that probability was 41.6% in 2020 and 41.0% in the most recent ACS estimates.

Allegheny County is ranked the 2nd most populous county in Pennsylvania, out of 67 counties. Allegheny County was ranked the 2nd most populous county in the 2020 Census.

Allegheny County's White Population

934,734 residents of Allegheny County, or 75.5% of the population, identify as White. The share of White residents in Allegheny County is slightly higher than in Pennsylvania overall, where 73% of the population is White. Allegheny County ranks 59th statewide in terms of White residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's White population has remained roughly the same. White residents' share of Allegheny County's population has increased from 75.0% to 75.5%.

Allegheny County is less White than neighboring Washington County (89.7% White), Beaver County (86.3% White), Butler County (92.2% White), Westmoreland County (91.4% White), and Hancock County (92% White).

Allegheny County's Black Population

152,924 residents of Allegheny County, or 12.4% of the population, identify as Black. The share of Black residents in Allegheny County is slightly higher than in Pennsylvania overall, where 10.3% of the population is Black. Allegheny County ranks 6th statewide in terms of Black residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's Black population has declined by an estimated 5.3%. Black residents' share of Allegheny County's population has decreased from 12.9% to 12.4%.

Allegheny County is more Black than neighboring Washington County (3.2% Black), Beaver County (6.2% Black), Butler County (1.1% Black), Westmoreland County (2.5% Black), and Hancock County (1.8% Black).

Allegheny County's Asian Population

53,578 residents of Allegheny County, or 4.3% of the population, identify as Asian. The share of Asian residents in Allegheny County is comparable to the share in Pennsylvania overall, where 3.8% of the population is Asian. Allegheny County ranks 9th statewide in terms of Asian residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's Asian population has declined by an estimated 8.1%. Asian residents' share of Allegheny County's population has remained roughly unchanged at 4.3%.

Allegheny County is more Asian than neighboring Washington County (1.3% Asian), Beaver County (0.5% Asian), Butler County (1.4% Asian), Westmoreland County (1% Asian), and Hancock County (0.5% Asian).

Allegheny County's Hispanic Population

36,691 residents of Allegheny County, or 3.0% of the population, identify as Hispanic. The share of Hispanic residents in Allegheny County is lower than in Pennsylvania overall, where 8.7% of the population is Hispanic. Allegheny County ranks 31st statewide in terms of Hispanic residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's Hispanic population has grown by an estimated 6.9%. Hispanic residents' share of Allegheny County's population has remained roughly unchanged at 3.0%.

Allegheny County is more Hispanic than neighboring Washington County (2.1% Hispanic), Beaver County (2.4% Hispanic), Butler County (2% Hispanic), Westmoreland County (1.6% Hispanic), and Hancock County (1.7% Hispanic).

Allegheny County's Native American/Other Population

7,588 residents of Allegheny County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Allegheny County is comparable to the share in Pennsylvania overall, where 0.6% of the population is Native American/Other. Allegheny County ranks 7th statewide in terms of Native American/Other residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's Native American/Other population has declined by an estimated 1.1%. Native American/Other residents' share of Allegheny County's population has remained roughly unchanged at 0.6%.

Allegheny County is more Native American/Other than neighboring Washington County (0.3% Native American/Other), Beaver County (0.4% Native American/Other), Butler County (0.5% Native American/Other), Westmoreland County (0.2% Native American/Other), and Hancock County (0.5% Native American/Other).

Allegheny County's Multiracial Population

52,662 residents of Allegheny County, or 4.3% of the population, identify as Multiracial. The share of Multiracial residents in Allegheny County is comparable to the share in Pennsylvania overall, where 3.6% of the population is Multiracial. Allegheny County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 67 counties.

Since the 2020 Census, Allegheny County's Multiracial population has grown by an estimated 4.4%. Multiracial residents' share of Allegheny County's population has remained roughly unchanged at 4.3%.

Allegheny County is more Multiracial than neighboring Washington County (3.5% Multiracial), Butler County (2.7% Multiracial), Westmoreland County (3.3% Multiracial), and Hancock County (3.5% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.