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.

Westmoreland County within Pennsylvania · Source: US Census TIGER/Line via us-atlas

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 distinguished by its share of foreign-born residents, 11.7% of the population. Westmoreland County is a county in Pennsylvania with a population of 353,345. It ranks #11 among counties in Pennsylvania by population.

Median household income is $72,468, below the US median of $78,538. The poverty rate, 6.3%, is on the lower side for US counties and below the national 12.4%. Median home value is $193,100, with typical rent around $843.

College attainment is above the local norm at 31.8%, below the national 35.0%. Remote work is on the higher side at 11.8%, below the national 14.0%, and the average commute runs about 27 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%.

Westmoreland County population, 2010–2024 · Source: U.S. Census Bureau — decennial census & Population Estimates

350,935

Population (2024)

365,029

Population (2010)

365,029

Peak (2010)

-0.28%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	365,029	-	-	estimate
2011	364,450	-579	-0.16%	estimate
2012	362,825	-1,625	-0.45%	estimate
2013	360,720	-2,105	-0.58%	estimate
2014	358,931	-1,789	-0.50%	estimate
2015	357,006	-1,925	-0.54%	estimate
2016	354,763	-2,243	-0.63%	estimate
2017	352,152	-2,611	-0.74%	estimate
2018	350,600	-1,552	-0.44%	estimate
2019	348,941	-1,659	-0.47%	estimate
2020	354,339	+5,398	+1.55%	estimate
2021	353,753	-586	-0.17%	estimate
2022	352,054	-1,699	-0.48%	estimate
2023	351,420	-634	-0.18%	estimate
2024	350,935	-485	-0.14%	estimate

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

Under 5

4.3%

5–9

5.0%

10–14

5.5%

15–19

5.6%

20–24

5.1%

25–34

10.8%

35–44

11.4%

45–54

12.7%

55–59

7.5%

60–64

8.3%

65–74

13.9%

75–84

6.6%

85+

3.2%

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

Professional & business services

24.9%

Manufacturing

14.6%

Finance & real estate

9.6%

Education & health care

7.3%

Construction

7.0%

Retail trade

5.9%

Information

5.5%

Arts, entertainment & food

5.2%

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+

Largest cities in Pennsylvania

Philadelphia (1,582,432)Pittsburgh (303,620)Allentown (125,320)Reading (94,836)Erie (94,156)Bethlehem (77,069)Scranton (76,074)Lancaster (57,683)Levittown (50,930)Harrisburg (50,092)All Pennsylvania cities →

Other counties in Pennsylvania

Philadelphia County (1,582,432)Allegheny County (1,240,476)Montgomery County (861,225)Bucks County (645,993)Delaware County (576,195)Lancaster County (555,151)Chester County (540,896)York County (459,312)Berks County (429,989)Lehigh County (375,408)All Pennsylvania counties →

Part of Pennsylvania

Pennsylvania demographic profile All Pennsylvania data →

Metro areas in Pennsylvania

Philadelphia (6,241,882)Pittsburgh (2,443,921)Allentown (866,764)Harrisburg (597,894)Scranton (567,887)Lancaster (555,151)York (459,312)Reading (429,989)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All 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.