Washington County's estimated 2025 population is 13,362 with a growth rate of -0.65% in the past year according to the most recent United States census data. Washington County is the 75th largest county in Illinois. The 2010 population was 14,711 and has seen a growth of -9.17% since that time.
Data after 2023 is projected based on recent change
The racial composition of Washington County includes 95.59% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 13,078 | 95.59% |
| Two or more races | 410 | 3% |
| Black or African American | 106 | 0.77% |
| Other race | 42 | 0.31% |
| Asian | 33 | 0.24% |
| Native American | 13 | 0.1% |
Married
Widowed
Divorced
Separated
Never Married
Washington County's average per capita income is $46,783. Household income levels show a median of $75,652. The poverty rate stands at 7.8%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,192 | - |
| Families | $94,529 | $104,605 |
| Households | $75,652 | $89,742 |
| Non Families | $43,250 | $58,166 |
Average Income
Median Household Income
Poverty Rate
