Allegheny County, Pennsylvania
Located in Pennsylvania, Allegheny County has a population of 1,238,177 residents and a median age of 40.6 years, making it the #36 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.5%. The median home value is $227,600, and the median household income is $78,548, which is 5% above the national median.
Demographics
Allegheny County has a population of 1,238,177, making it the #36 most populous county in the US. The median age is 40.6 years, which is 4.4% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Allegheny County is $78,548, ranking #645 out of 3,222 counties — 4.5% above the national median. The poverty rate is 11.5% and unemployment stands at 5.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Allegheny County is $227,600 (-19.3% vs national). Renters pay a median of $1,153/mo and the homeownership rate is 65.2%.
Median Home Value Trend
Rankings →Household Type
Education
In Allegheny County, 45.8% of adults age 25+ hold a bachelor's degree or higher, which is 35.8% above the national average, ranking #159 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Allegheny County is 76.9 years. 16.1% of adults report poor or fair health and 4.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.4% of adults in Allegheny County smoke , 32.0% are obese , and 22.9% report excessive drinking. The drug overdose death rate is 52.4 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Allegheny County is 8.6 per 100,000 and the suicide rate is 13.3 per 100,000. Motor vehicle deaths occur at a rate of 6.3 per 100,000.
Homicide Rate Trend
Families & Children
15.2% of children in Allegheny County live in poverty and the infant mortality rate is 6.2 per 1,000 live births. The teen birth rate is 9.0 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Allegheny County is 75.3%. The mean commute time is 27.8 min, which is 0.8% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Allegheny County voted Democratic with a margin of 20.3%. The vote was 59.7% Dem / 39.4% Rep. Compared to 2020, the margin shifted 0.1 toward Republicans .
Vote Share Over Time
About Allegheny County, Pennsylvania
Allegheny County, Pennsylvania has a total population of 1,238,177, making it the 36th most populous county in the United States. The median age in Allegheny County is 40.6 years, which is 4.4% above the national median of 38.9 years.
The median household income in Allegheny County is $78,548, which ranks #645 of 3,222 counties nationwide. This is 4.5% above the national median of $75,149. The poverty rate is 11.5%, lower than the national rate of 12.6%. The unemployment rate stands at 5.0%.
The median home value in Allegheny County is $227,600, 19.3% below the national median. Renters in Allegheny County pay a median gross rent of $1,153 per month. The homeownership rate is 65.2%, compared to the national rate of 64.4%.
In Allegheny County, 45.8% of residents aged 25 and older hold a bachelor's degree or higher, 35.8% above the national average of 33.7%. Health insurance coverage stands at 96.2% of the population. The average commute time for workers is 27.8 min.
Allegheny County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 75.5% of the population, followed by Black (non-Hispanic) (12.4%) and Asian (non-Hispanic) (4.3%).
All data for Allegheny County, Pennsylvania comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.