Ottawa County's 2026 population is estimated at 39,438, reflecting a -0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Ottawa County is the 62nd largest county in Ohio. The 2010 population was 41,359 and has grown -4.64% since 2010.
Data after 2023 is projected based on recent change
Overall: 50.6 years
Female: 51.1 years
Male: 50.2 years
There are 32,979 adults, (11,070 of whom are seniors) in Ottawa County.
Female: 20,016 (50%)
Male: 19,978 (50%)
The racial composition of Ottawa County includes 92.02% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 36,803 | 92.02% |
| Two or more races | 1,779 | 4.45% |
| Other race | 734 | 1.84% |
| Black or African American | 434 | 1.09% |
| Asian | 168 | 0.42% |
| Native American | 66 | 0.17% |
| Native Hawaiian or Pacific Islander | 10 | 0.03% |
Ottawa County 's average per capita income is $53,345. Household income levels show a median of $76,101. The poverty rate stands at 8.43%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $108,285 | - |
| Families | $97,364 | $127,603 |
| Households | $76,101 | $104,812 |
| Non Families | $46,250 | $63,704 |
Average Income
Median Household Income
Poverty Rate