Defiance County's 2026 population is estimated at 39,058, reflecting a 0.53% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Defiance County is the 63rd largest county in Ohio. The 2010 population was 39,083 and has grown -0.06% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.1 years
Female: 42.5 years
Male: 39.1 years
There are 29,717 adults, (7,741 of whom are seniors) in Defiance County.
Female: 18,900 (49.3%)
Male: 19,443 (50.7%)
The racial composition of Defiance County includes 86.73% White, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 33,256 | 86.73% |
| Two or more races | 3,103 | 8.09% |
| Other race | 1,068 | 2.79% |
| Black or African American | 633 | 1.65% |
| Asian | 124 | 0.32% |
| Native Hawaiian or Pacific Islander | 109 | 0.28% |
| Native American | 50 | 0.13% |
Defiance County 's average per capita income is $47,423. Household income levels show a median of $73,064. The poverty rate stands at 10.48%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,706 | - |
| Families | $89,353 | $102,866 |
| Households | $73,064 | $88,073 |
| Non Families | $38,848 | $52,750 |
Average Income
Median Household Income
Poverty Rate
