Washtenaw County's 2026 population is estimated at 371,472, reflecting a 0.34% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Washtenaw County is the 6th largest county in Michigan. The 2010 population was 345,980 and has grown 7.37% since 2010.
Overall: 35 years
Female: 36.1 years
Male: 34 years
There are 302,348 adults, (58,242 of whom are seniors) in Washtenaw County.
Female: 185,350 (50.1%)
Male: 184,472 (49.9%)
The racial composition of Washtenaw County includes 68.68% White, 11.47% Black or African American, 9.23% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 253,992 | 68.68% |
| Black or African American | 42,421 | 11.47% |
| Asian | 34,148 | 9.23% |
| Two or more races | 31,227 | 8.44% |
| Other race | 6,917 | 1.87% |
| Native American | 1,007 | 0.27% |
| Native Hawaiian or Pacific Islander | 110 | 0.03% |
Washtenaw County 's average per capita income is $60,100. Household income levels show a median of $89,180. The poverty rate stands at 14.17%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $146,817 | $186,901 |
| Families | $126,625 | $164,196 |
| Households | $89,180 | $124,712 |
| Non Families | $52,056 | $71,797 |
Average Income
Median Household Income
Poverty Rate
