Westmoreland County's estimated 2026 population is 349,965 with a growth rate of -0.14% 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 -4.13% since that time.
Data after 2023 is projected based on recent change
The racial composition of Westmoreland County includes 92.57% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (92.57%)
Two or more races (3.5%)
Black or African American (2.51%)
Asian (0.92%)
Other race (0.44%)
Native American (0.05%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 327,086 | 92.57% |
| Two or more races | 12,357 | 3.5% |
| Black or African American | 8,858 | 2.51% |
| Asian | 3,248 | 0.92% |
| Other race | 1,547 | 0.44% |
| Native American | 188 | 0.05% |
| Native Hawaiian or Pacific Islander | 61 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Westmoreland County's average per capita income is $50,881. Household income levels show a median of $72,468. The poverty rate stands at 10.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,763 | $131,032 |
| Families | $94,904 | $117,366 |
| Households | $72,468 | $95,075 |
| Non Families | $38,952 | $54,589 |
Average Income
Median Household Income
Poverty Rate