Westmoreland County, Pennsylvania Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in Pennsylvania
The population of Westmoreland County, Pennsylvania is 353,345 as of the 2023 American Community Survey, making it the 11th-largest county in Pennsylvania. The median household income is $72,468, the median home value is $193,100, and the median age is 47.1.
The population of Westmoreland County has declined 3.9% since 2010 (365,029 → 350,935), a -0.28% annualized rate.
353,345
Population
-0.28%
Annual growth
344
People / sq mi
$72,468
Median Income
$193,100
Median Home Value
Westmoreland County covers 1,028 sq mi of land at 343.8 people per square mile.
About Westmoreland County, PA
Westmoreland County is a county in Pennsylvania with a population of 353,345. It ranks #11 among counties in Pennsylvania by population. The median age is 47.1, older than the national median. The population is 49.4% male and 50.6% female.
The median household income in Westmoreland County is $72,468, near the US median of $74,580. 6.3% of residents live below the federal poverty level. Home values sit at a median of $193,100, with monthly rent averaging $843. The homeownership rate of 78.3% is higher than the national rate of 64.8%.
Educational attainment in Westmoreland County reflects 31.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 11.8% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 27.1 minutes each way.
Westmoreland County Population History (2010-2024)
The county of Westmoreland County had a population of 365,029 in 2010 and 350,935 in 2024, a -3.9% growth over 14 years. The peak was 365,029 in 2010. Average annual growth rate: -0.28%.
350,935
Population (2024)
365,029
Population (2010)
365,029
Peak (2010)
-0.28%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 365,029 |
| 2011 | 364,450 |
| 2012 | 362,825 |
| 2013 | 360,720 |
| 2014 | 358,931 |
| 2015 | 357,006 |
| 2016 | 354,763 |
| 2017 | 352,152 |
| 2018 | 350,600 |
| 2019 | 348,941 |
| 2020 | 354,339 |
| 2021 | 353,753 |
| 2022 | 352,054 |
| 2023 | 351,420 |
| 2024 | 350,935 |
Race & Ethnicity
| White | 92.6% |
| Black or African American | 2.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.6% |
| Two or More Races | 0.0% |
Age & Sex
47.1
Median Age
50.6%
Female
49.4%
Male
23.7%
Age 65+
Age Distribution
Children (under 15): 14.8% · Seniors (65+): 23.7%
Income & Poverty
| Median household income | $72,468$-3,613 vs state |
| Mean household income | $95,075 |
| Per-capita income | $42,132 |
| Poverty rate | 6.3%-1.8% vs state |
| Unemployment rate | 2.9% |
| Employment-to-population | 57.8% |
Top Industries by Employment
The largest employment sector in Westmoreland County is professional & business services, accounting for 24.9% of workers.
How residents commute
0.8%
Drive alone
1.7%
Carpool
78.0%
Public transit
11.8%
Work from home
27.1 min
Avg commute
Housing
$193,100$-47,400 vs state
Median home value
$843
Median rent
78.3%
Homeownership rate
168,406
Total housing units
91.7%
Occupied
8.3%
Vacant
21.7%
Renter-occupied
Social & access
96.8%
With health insurance
91.2%
With broadband internet
11.7%
Foreign-born
7.7%
Veterans (18+)
15.1%
With a disability
97.4%
Speak language other than English at home
Education
95.4%
High School+
31.8%
Bachelor's+
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County rankings
Frequently Asked Questions
Westmoreland County, Pennsylvania has a population of 353,345 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in Pennsylvania. Population density is 344 people per square mile.
The population of Westmoreland County has declined 3.9% since 2010 (365,029 → 350,935), a -0.28% annualized rate.
The median household income in Westmoreland County, Pennsylvania is $72,468, with mean (average) household income of $95,075 and per-capita income of $42,132. 6.3% of residents live below the federal poverty level.
In Westmoreland County, the largest racial and ethnic groups are White (92.6%), Black or African American (2.5%), Hispanic or Latino (0.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Westmoreland County, Pennsylvania is 47.1 years. Residents are 50.6% female and 49.4% male.
The median home value in Westmoreland County is $193,100 and median monthly rent is $843. 78.3% of occupied housing units are owner-occupied. The county has 168,406 total housing units, 8.3% of which are vacant.
The largest employment sector in Westmoreland County, Pennsylvania is professional, scientific, and management services, employing 24.9% of workers. The unemployment rate is 2.9%.
Philadelphia is among the largest cities associated with Westmoreland 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.