Washington County's estimated 2026 population is 24,009 with a growth rate of 0.84% in the past year according to the most recent United States census data. Washington County is the 47th largest county in Missouri. The 2010 population was 25,198 and has seen a growth of -4.72% since that time.
Data after 2023 is projected based on recent change
Overall: 40.7 years
Female: 42.1 years
Male: 39.8 years
There are 17,944 adults, (4,208 of whom are seniors) in Washington County.
Female: 11,293 (48.1%)
Male: 12,177 (51.9%)
The racial composition of Washington County includes 92.1% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 21,617 | 92.1% |
| Two or more races | 1,265 | 5.39% |
| Black or African American | 416 | 1.77% |
| Other race | 135 | 0.58% |
| Asian | 31 | 0.13% |
| Native American | 6 | 0.03% |
Washington County's average per capita income is $41,592. Household income levels show a median of $56,043. The poverty rate stands at 17.38%.
Name | Median | Mean |
|---|---|---|
| Married Families | $79,906 | - |
| Families | $73,902 | $80,094 |
| Households | $56,043 | $75,592 |
| Non Families | $26,308 | $61,801 |
Average Income
Median Household Income
Poverty Rate
