Washington County's estimated 2026 population is 13,549 with a growth rate of -0.11% 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 -7.9% since that time.
Data after 2023 is projected based on recent change
Overall: 44.2 years
Female: 45.4 years
Male: 43.1 years
There are 10,791 adults, (2,948 of whom are seniors) in Washington County.
Female: 6,716 (49.3%)
Male: 6,911 (50.7%)
The racial composition of Washington County includes 95.16% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,968 | 95.16% |
| Two or more races | 354 | 2.6% |
| Black or African American | 202 | 1.48% |
| Other race | 51 | 0.37% |
| Asian | 32 | 0.23% |
| Native American | 20 | 0.15% |
Washington County's average per capita income is $49,426. Household income levels show a median of $78,224. The poverty rate stands at 7.53%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,019 | - |
| Families | $94,211 | $109,122 |
| Households | $78,224 | $93,788 |
| Non Families | $45,089 | $62,010 |
Average Income
Median Household Income
Poverty Rate
