Allegheny County, Pennsylvania Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 2nd-largest in Pennsylvania
The population of Allegheny County, Pennsylvania is 1,240,476 as of the 2023 American Community Survey, making it the 2nd-largest county in Pennsylvania. The median household income is $76,393, the median home value is $216,700, and the median age is 40.6.
The population of Allegheny County has grown 0.6% since 2010 (1,223,973 → 1,231,814), a +0.05% annualized rate.
1,240,476
Population
+0.05%
Annual growth
1699
People / sq mi
$76,393
Median Income
$216,700
Median Home Value
Allegheny County covers 730 sq mi of land at 1699.4 people per square mile.
About Allegheny County, PA
What distinguishes Allegheny County is density: among the most densely settled of US counties, around 1,699 people per square mile. With 1,240,476 residents, Allegheny County is a county in Pennsylvania. That makes it one of the ten largest counties in Pennsylvania in the country, at #2 by population.
Median household income is $76,393, near the US median of $78,538. About 7.1% of residents live below the federal poverty level, below the national 12.4%. Median home value is $216,700, with typical rent around $1,111.
The population is unusually well-credentialed for US counties — 44.8% of adults have a four-year degree, above the national 35.0%. An unusually large 18.6% of workers are remote, above the national 14.0%, and the average commute runs about 26 minutes each way.
That density explains much of the rest of the profile in Allegheny County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Allegheny County Population History (2010-2024)
The county of Allegheny County had a population of 1,223,973 in 2010 and 1,231,814 in 2024, a 0.6% growth over 14 years. The peak was 1,249,671 in 2020. Average annual growth rate: 0.05%.
1,231,814
Population (2024)
1,223,973
Population (2010)
1,249,671
Peak (2020)
0.05%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 1,223,973 |
| 2011 | 1,228,437 |
| 2012 | 1,231,129 |
| 2013 | 1,233,999 |
| 2014 | 1,233,417 |
| 2015 | 1,229,342 |
| 2016 | 1,226,893 |
| 2017 | 1,220,423 |
| 2018 | 1,217,508 |
| 2019 | 1,215,716 |
| 2020 | 1,249,671 |
| 2021 | 1,245,440 |
| 2022 | 1,233,821 |
| 2023 | 1,230,138 |
| 2024 | 1,231,814 |
Race & Ethnicity
| White | 76.9% |
| Black or African American | 12.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Age & Sex
40.6
Median Age
51.2%
Female
48.8%
Male
19.8%
Age 65+
Age Distribution
Children (under 15): 15.5% · Seniors (65+): 19.8%
Income & Poverty
| Median household income | $76,393+$312 vs state |
| Mean household income | $107,275 |
| Per-capita income | $48,208 |
| Poverty rate | 7.1%-1.0% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 61.6% |
Top Industries by Employment
The largest employment sector in Allegheny County is professional & business services, accounting for 28.3% of workers.
How residents commute
6.2%
Drive alone
3.7%
Carpool
63.3%
Public transit
18.6%
Work from home
25.7 min
Avg commute
Housing
$216,700$-23,800 vs state
Median home value
$1,111
Median rent
64.9%
Homeownership rate
604,558
Total housing units
90.4%
Occupied
9.6%
Vacant
35.1%
Renter-occupied
Social & access
96.1%
With health insurance
93.3%
With broadband internet
17.3%
Foreign-born
6.0%
Veterans (18+)
13.8%
With a disability
91.9%
Speak language other than English at home
Education
95.5%
High School+
44.8%
Bachelor's+
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County rankings
Common questions about Allegheny County, PA
Frequently Asked Questions
Allegheny County, Pennsylvania has a population of 1,240,476 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 2nd-largest county in Pennsylvania. Population density is 1699 people per square mile.
The population of Allegheny County has grown 0.6% since 2010 (1,223,973 → 1,231,814), a +0.05% annualized rate.
The median household income in Allegheny County, Pennsylvania is $76,393, with mean (average) household income of $107,275 and per-capita income of $48,208. 7.1% of residents live below the federal poverty level.
In Allegheny County, the largest racial and ethnic groups are White (76.9%), Black or African American (12.5%), Hispanic or Latino (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allegheny County, Pennsylvania is 40.6 years. Residents are 51.2% female and 48.8% male.
The median home value in Allegheny County is $216,700 and median monthly rent is $1,111. 64.9% of occupied housing units are owner-occupied. The county has 604,558 total housing units, 9.6% of which are vacant.
The largest employment sector in Allegheny County, Pennsylvania is professional, scientific, and management services, employing 28.3% of workers. The unemployment rate is 3.2%.
Philadelphia is among the largest cities associated with Allegheny County, Pennsylvania, with a population of 1,582,432.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.