2nd most populous of 67
With 1,231,814 residents in 2024, Allegheny County ranks 2nd by population among Pennsylvania's 67 counties and is home to 9.4% of the state's residents.
Allegheny County is home to 1,231,814 people (2024 estimate) on 730 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Key indicators
Population
1,231,814
July 1, 2024 estimate
2020 Census base
1,250,583
April 1, 2020
Change since 2020
−1.5%
2020–2024
Land area
730 mi²
1,891 km²
Population density
1,687.5 /mi²
2024 estimate ÷ land area
Births
11,751
Year to July 1, 2024
Deaths
13,444
Year to July 1, 2024
Natural change
−1,693
Births minus deaths, 2024
Net migration
+3,356
Domestic + international, 2024
Per capita personal income
$77,685
BEA, 2024
Gross domestic product
$132.9 billion
BEA, current dollars, 2024
Median household income
$78,548
ACS 2020–2024 5-year
Poverty rate
11.5%
ACS 2020–2024 5-year
Bachelor’s degree or higher
45.8%
Age 25+, ACS 2020–2024 5-year
Foreign-born residents
6.6%
ACS 2020–2024 5-year
Median home value
$227,600
ACS 2020–2024 5-year
Unemployment rate
3.6%
BLS annual average, 2024
Historical data
Pick an indicator to see its long-run evolution.
Population
2000–20241,231,814▼ 4%
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
Data summary
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 1,231,814 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 1,223,348 | 2010 · U.S. Census Bureau |
| Population, 2000 | 1,279,651 | July 1, 2000 · Census intercensal |
| Change since 2000 | −3.7% | 2000–2024 · Census |
| International migration | +8,548 | 2024 · Census Vintage 2024 |
| Domestic migration | −5,192 | 2024 · Census Vintage 2024 |
| Birth rate | 9.5 per 1,000 | 2024 · calculated |
| Death rate | 10.9 per 1,000 | 2024 · calculated |
| Population rank in Pennsylvania | 2nd of 67 | 2024 · calculated |
| Per capita personal income | $77,685 | BEA, 2024 · official |
| Gross domestic product | $132.9 billion | BEA, current dollars, 2024 · official |
| Median household income | $78,548 | ACS 2020–2024 5-year · official |
| Poverty rate | 11.5% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 45.8% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 6.6% | ACS 2020–2024 5-year · official |
| Median home value | $227,600 | ACS 2020–2024 5-year · official |
| Median gross rent | $1,153/month | ACS 2020–2024 5-year · official |
| Median age | 40.6 years | ACS 2020–2024 5-year · official |
| Households | 545,802 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 65.2% | ACS 2020–2024 5-year · official |
Allegheny County in context
Comparable indicators for Allegheny County, Pennsylvania and the United States.
| Indicator | County | Pennsylvania | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | −1.5% | +0.6% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 9.5 | 9.8 | 10.6 | 2024 |
| Death rate (per 1,000) | 10.9 | 10.5 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 2.7 | 5.4 | 8.2 | 2024 |
| Population density (/mi²) | 1687.5 | 292.3 | 96.3 | 2024 |
| Per capita personal income | $77,685 | $70,678 | $73,204 | BEA, 2024 |
| Median household income | $78,548 | $77,971 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 11.5% | 11.7% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 45.8% | 35.2% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 6.6% | 7.7% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $227,600 | $254,500 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $1,153/month | $1,209/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 40.6 years | 40.9 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 65.2% | 69.3% | 65.2% | ACS 2020–2024 5-year |
Cities & towns
1 city · choose how to order them
Did you know? Allegheny County
A quarter century of change
Its population went from 1,279,651 in 2000 to 1,231,814 in 2024, a change of −3.7%, compared with +6.5% for Pennsylvania as a whole.
Births and deaths
In the year to July 2024 the county recorded 11,751 births and 13,444 deaths, so deaths outnumbered births by 1,693.
Peak population in 2000
Annual Census estimates since 2000 put the county's highest population at 1,279,651 in 2000. The 2024 figure is 47,837 lower.
4th in density
Allegheny County has about 1687.5 residents per square mile of land, ranking 4th of 67 counties; Pennsylvania averages 292.3.
Household income rank
With a median household income of $78,548 (ACS 2020–2024 5-year), the county ranks 17th of 67 Pennsylvania counties; the state median is $77,971.
Size of the economy
Its economy produced $132.9 billion of GDP in 2024 (BEA), 2nd largest among 67 Pennsylvania counties.
Latest economic growth
Real GDP grew 1.6% in 2024, adjusted for inflation (BEA, chained 2017 dollars).
Sources and methodology
- U.S. Census Bureau — County population totals and components, Vintage 2024
- U.S. Census Bureau — County estimates 2010–2020
- U.S. Census Bureau — Intercensal estimates 2000–2010
- U.S. Census Bureau — Gazetteer files (land area)
- U.S. Census Bureau — American Community Survey 2020–2024 5-year
- U.S. Bureau of Economic Analysis — Regional economic accounts
- U.S. Bureau of Labor Statistics — LAUS