11th most populous of 67
With 350,935 residents in 2024, Westmoreland County ranks 11th by population among Pennsylvania's 67 counties and is home to 2.7% of the state's residents.
Westmoreland County is home to 350,935 people (2024 estimate) on 1,028 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
350,935
July 1, 2024 estimate
2020 Census base
354,648
April 1, 2020
Change since 2020
−1.0%
2020–2024
Land area
1,028 mi²
2,662 km²
Population density
341.5 /mi²
2024 estimate ÷ land area
Births
2,877
Year to July 1, 2024
Deaths
4,617
Year to July 1, 2024
Natural change
−1,740
Births minus deaths, 2024
Net migration
+1,280
Domestic + international, 2024
Per capita personal income
$66,110
BEA, 2024
Gross domestic product
$19.4 billion
BEA, current dollars, 2024
Median household income
$74,109
ACS 2020–2024 5-year
Poverty rate
10.3%
ACS 2020–2024 5-year
Bachelor’s degree or higher
32.8%
Age 25+, ACS 2020–2024 5-year
Foreign-born residents
1.9%
ACS 2020–2024 5-year
Median home value
$203,500
ACS 2020–2024 5-year
Unemployment rate
3.8%
BLS annual average, 2024
Historical data
Pick an indicator to see its long-run evolution.
Population
2000–2024350,935▼ 5%
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 | 350,935 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 365,169 | 2010 · U.S. Census Bureau |
| Population, 2000 | 369,664 | July 1, 2000 · Census intercensal |
| Change since 2000 | −5.1% | 2000–2024 · Census |
| International migration | +353 | 2024 · Census Vintage 2024 |
| Domestic migration | +927 | 2024 · Census Vintage 2024 |
| Birth rate | 8.2 per 1,000 | 2024 · calculated |
| Death rate | 13.2 per 1,000 | 2024 · calculated |
| Population rank in Pennsylvania | 11th of 67 | 2024 · calculated |
| Per capita personal income | $66,110 | BEA, 2024 · official |
| Gross domestic product | $19.4 billion | BEA, current dollars, 2024 · official |
| Median household income | $74,109 | ACS 2020–2024 5-year · official |
| Poverty rate | 10.3% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 32.8% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 1.9% | ACS 2020–2024 5-year · official |
| Median home value | $203,500 | ACS 2020–2024 5-year · official |
| Median gross rent | $879/month | ACS 2020–2024 5-year · official |
| Median age | 47.2 years | ACS 2020–2024 5-year · official |
| Households | 154,979 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 78.4% | ACS 2020–2024 5-year · official |
Westmoreland County in context
Comparable indicators for Westmoreland County, Pennsylvania and the United States.
| Indicator | County | Pennsylvania | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | −1.0% | +0.6% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 8.2 | 9.8 | 10.6 | 2024 |
| Death rate (per 1,000) | 13.2 | 10.5 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 3.6 | 5.4 | 8.2 | 2024 |
| Population density (/mi²) | 341.5 | 292.3 | 96.3 | 2024 |
| Per capita personal income | $66,110 | $70,678 | $73,204 | BEA, 2024 |
| Median household income | $74,109 | $77,971 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 10.3% | 11.7% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 32.8% | 35.2% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 1.9% | 7.7% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $203,500 | $254,500 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $879/month | $1,209/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 47.2 years | 40.9 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 78.4% | 69.3% | 65.2% | ACS 2020–2024 5-year |
Did you know? Westmoreland County
A quarter century of change
Its population went from 369,664 in 2000 to 350,935 in 2024, a change of −5.1%, compared with +6.5% for Pennsylvania as a whole.
Births and deaths
In the year to July 2024 the county recorded 2,877 births and 4,617 deaths, so deaths outnumbered births by 1,740.
Peak population in 2000
Annual Census estimates since 2000 put the county's highest population at 369,664 in 2000. The 2024 figure is 18,729 lower.
18th in density
Westmoreland County has about 341.5 residents per square mile of land, ranking 18th of 67 counties; Pennsylvania averages 292.3.
Household income rank
With a median household income of $74,109 (ACS 2020–2024 5-year), the county ranks 24th of 67 Pennsylvania counties; the state median is $77,971.
Size of the economy
Its economy produced $19.4 billion of GDP in 2024 (BEA), 15th largest among 67 Pennsylvania counties.
Latest economic growth
Real GDP grew 0.5% 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