Washington County's 2026 population is estimated at 5,505, reflecting a -0.51% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Washington County is the 61st largest county in Kansas. The 2010 population was 5,785 and has grown -4.84% since 2010.
Overall: 43.4 years
Female: 44.2 years
Male: 43.1 years
There are 4,193 adults, (1,307 of whom are seniors) in Washington County.
Female: 2,670 (48.3%)
Male: 2,863 (51.7%)
The racial composition of Washington County includes 91.52% White, and smaller percentages for other race, Native American, Asian, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 5,064 | 91.52% |
| Two or more races | 256 | 4.63% |
| Other race | 161 | 2.91% |
| Native American | 22 | 0.4% |
| Asian | 22 | 0.4% |
| Black or African American | 8 | 0.14% |
Washington County 's average per capita income is $44,035. Household income levels show a median of $65,482. The poverty rate stands at 9.28%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $87,557 | - |
| Families | $83,179 | $98,983 |
| Households | $65,482 | $82,039 |
| Non Families | $33,100 | $56,329 |
Average Income
Median Household Income
Poverty Rate