Williams County's 2026 population is estimated at 36,530, reflecting a -0.03% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Williams County is the 68th largest county in Ohio. The 2010 population was 37,510 and has grown -2.61% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.6 years
Female: 42.7 years
Male: 40.6 years
There are 28,635 adults, (7,368 of whom are seniors) in Williams County.
Female: 18,481 (50.3%)
Male: 18,238 (49.7%)
The racial composition of Williams County includes 91.7% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 33,673 | 91.7% |
| Two or more races | 1,730 | 4.71% |
| Other race | 766 | 2.09% |
| Asian | 241 | 0.66% |
| Black or African American | 228 | 0.62% |
| Native American | 73 | 0.2% |
| Native Hawaiian or Pacific Islander | 8 | 0.02% |
Williams County 's average per capita income is $43,429. Household income levels show a median of $61,048. The poverty rate stands at 12.75%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $90,401 | $100,390 |
| Families | $77,036 | $87,070 |
| Households | $61,048 | $75,921 |
| Non Families | $36,975 | $51,625 |
Average Income
Median Household Income
Poverty Rate
