Demographics of Allegheny County, Pennsylvania

Allegheny County, Pennsylvania had 1,225,035 people on July 1, 2025, by the Census Bureau’s estimate: −24,550 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Allegheny County, in four figures

1,225,035
Population: July 1, 2025, Vintage 2025 estimate.; −2.0%
Change since July 2020: −24,550 people.; 40.6 ±0.2
Median age: ACS 2020–⁠2024.; $78,548 ±$994
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Allegheny County, Pennsylvania's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Allegheny County, Pennsylvania's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Allegheny County, Pennsylvania's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Allegheny County, Pennsylvania's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	1,249,585	100.0	100.0
2021	1,245,335	99.7	100.2
2022	1,233,325	98.7	100.7
2023	1,228,911	98.3	101.6
2024	1,227,174	98.2	102.5
2025	1,225,035	98.0	103.1

3 more columns on a wider screen

Population of Allegheny County, Pennsylvania on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	1,249,585	−996	−517	+63	−894
2021	1,245,335	−4,250	−3,483	+1,124	−3,085
2022	1,233,325	−12,010	−3,097	+3,490	−12,168
2023	1,228,911	−4,414	−2,142	+6,265	−8,412
2024	1,227,174	−1,737	−1,866	+5,237	−5,033
2025	1,225,035	−2,139	−1,922	+2,485	−2,785

Age, 2020–2024

The median age is 40.6 ±0.2: for men 39.2 ±0.2 and for women 42.1 ±0.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Allegheny County by age, ACS 2020–2024
Age	People	Share	Pennsylvania	United States
Under 5	61,788 ±34	5.0% ±<0.1	5.2% ±<0.1	5.6% ±<0.1
5 to 17	168,440 ±2,053	13.6% ±0.2	15.2% ±0.1	16.3% ±<0.1
18 to 24	107,981 ±1,940	8.7% ±0.2	9.0% ±<0.1	9.1% ±<0.1
25 to 44	347,889 ±2,264	28.1% ±0.2	25.5% ±0.1	26.9% ±<0.1
45 to 64	302,193 ±2,274	24.4% ±0.2	25.6% ±0.1	24.8% ±<0.1
65 and over	249,886 ±2,765	20.2% ±0.2	19.5% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $78,548 ±$994, and income per person $49,588 ±$525, in 2024 dollars. The median is $77,971 ±$342 in Pennsylvania and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Allegheny County by income, ACS 2020–2024
Household income	Households	Share	Pennsylvania	United States
Under $25,000	86,622 ±2,374	15.9% ±0.4	15.1% ±0.1	14.6% ±<0.1
$25,000 to $49,999	93,323 ±2,516	17.1% ±0.5	17.4% ±0.1	16.7% ±<0.1
$50,000 to $74,999	82,657 ±2,156	15.1% ±0.4	15.9% ±0.1	15.5% ±<0.1
$75,000 to $99,999	67,373 ±2,000	12.3% ±0.4	12.8% ±0.1	12.6% ±<0.1
$100,000 to $149,999	93,180 ±2,340	17.1% ±0.4	17.7% ±0.1	17.5% ±<0.1
$150,000 to $199,999	53,234 ±1,504	9.8% ±0.3	9.3% ±0.1	9.6% ±<0.1
$200,000 or more	69,413 ±1,670	12.7% ±0.3	11.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

2 more columns on a wider screen

Poverty rate in Allegheny County by age, ACS 2020–2024
Age	Below poverty	Rate	Pennsylvania	United States
All ages	138,617 ±4,383	11.5% ±0.4	11.7% ±0.1	12.5% ±0.1
Under 18	33,927 ±1,838	14.9% ±0.8	15.6% ±0.2	16.1% ±0.1
18 to 59	71,270 ±2,517	11.0% ±0.4	11.0% ±0.2	11.6% ±0.1
60 and over	33,420 ±1,507	10.2% ±0.5	10.1% ±0.2	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Allegheny County, ACS 2020–2024
Measure	Allegheny County	Pennsylvania	United States
Housing units	606,827 ±276	5,806,452 ±672	143,775,355 ±10,234
Occupied	89.9% ±0.3	90.8% ±0.2	89.9% ±0.1
Vacant	10.1% ±0.3	9.2% ±0.2	10.1% ±0.1
Owner occupied	65.2% ±0.5	69.3% ±0.3	65.2% ±0.3
Renter occupied	34.8% ±0.5	30.7% ±0.2	34.8% ±0.1
Median home value	$227,600 ±$1,801	$254,500 ±$767	$332,700 ±$236
Median gross rent	$1,153 ±$10	$1,209 ±$5	$1,413 ±$2
Median year built	1957 ±2	1965 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

2 more columns on a wider screen

People in Allegheny County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Pennsylvania	United States
Hispanic or Latino	36,691 ±0	3.0% ±<0.1	8.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	934,734 ±1,344	75.5% ±0.1	73.0% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	152,924 ±1,901	12.4% ±0.2	10.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	53,578 ±956	4.3% ±0.1	3.8% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	628 ±124	0.1% ±<0.1	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	187 ±87	< 0.1% ±<0.1	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	6,773 ±1,204	0.5% ±0.1	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	52,662 ±2,449	4.3% ±0.2	3.6% ±0.1	4.3% ±<0.1

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

2 more columns on a wider screen

People in Allegheny County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Pennsylvania	United States
Born in the state	928,129 ±4,470	75.0% ±0.4	70.6% ±0.1	57.3% ±<0.1
Born in another state	217,580 ±4,006	17.6% ±0.3	19.8% ±0.1	26.9% ±<0.1
Born a citizen outside the states	10,850 ±1,151	0.9% ±0.1	1.9% ±<0.1	1.7% ±<0.1
Born abroad	81,618 ±2,439	6.6% ±0.2	7.7% ±0.1	14.1% ±<0.1
Naturalized citizens	40,875 ±1,757	3.3% ±0.1	4.3% ±0.1	7.4% ±<0.1
Not citizens	40,743 ±1,753	3.3% ±0.1	3.4% ±0.1	6.8% ±<0.1

Allegheny County among the counties of Pennsylvania

2nd of 67 by population, July 2025. Every one is listed on the Pennsylvania page.

Counties of Pennsylvania near Allegheny County in population, July 2025
County	July 2025	Change since 2020
Philadelphia County	1,574,281	−1.7%
Allegheny County	1,225,035	−2.0%
Montgomery County	877,643	+2.4%
Bucks County	647,828	+0.3%
Delaware County	580,937	+0.8%
Lancaster County	563,159	+1.9%
Chester County	557,116	+4.2%

Elsewhere on the site

Rankings this appears in

No. 2 Counties by population in Pennsylvania
No. 39 Counties by population
No. 48 Counties by population growth in Pennsylvania
No. 175 Counties by per capita income

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026