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.
Allegheny County, PA Climate
Allegheny County, PA has an average annual temperature of 11.3°C (52°F) and receives about 972 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.3°C
Avg Temp
972
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 63 mm |
| February | 0° / 32° | 58 mm |
| March | 5° / 41° | 83 mm |
| April | 11° / 51° | 82 mm |
| May | 17° / 62° | 101 mm |
| June | 21° / 70° | 99 mm |
| July | 23° / 74° | 100 mm |
| August | 22° / 72° | 90 mm |
| September | 19° / 65° | 81 mm |
| October | 12° / 54° | 65 mm |
| November | 6° / 44° | 77 mm |
| December | 1° / 34° | 73 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Allegheny County, PA
The most comfortable months to visit Allegheny County, PA are typically June, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -7°C low). May is usually the wettest month.
Where to stay near Allegheny County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.