Westmoreland County's estimated 2026 population is 348,175 with a growth rate of -0.33% in the past year according to the most recent United States census data. Westmoreland County is the 11th largest county in Pennsylvania. The 2010 population was 365,029 and has seen a growth of -4.62% since that time.
Data after 2023 is projected based on recent change
Overall: 47.2 years
Female: 48.8 years
Male: 45.5 years
There are 288,350 adults, (85,642 of whom are seniors) in Westmoreland County.
Female: 178,407 (50.6%)
Male: 174,093 (49.4%)
The racial composition of Westmoreland County includes 91.83% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 323,709 | 91.83% |
| Two or more races | 14,267 | 4.05% |
| Black or African American | 9,148 | 2.6% |
| Asian | 3,406 | 0.97% |
| Other race | 1,600 | 0.45% |
| Native American | 295 | 0.08% |
| Native Hawaiian or Pacific Islander | 75 | 0.02% |
Westmoreland County's average per capita income is $52,442. Household income levels show a median of $74,109. The poverty rate stands at 10.27%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,777 | $134,935 |
| Families | $97,102 | $120,393 |
| Households | $74,109 | $97,695 |
| Non Families | $40,532 | $56,433 |
Average Income
Median Household Income
Poverty Rate