Ottawa County's 2026 population is estimated at 311,555, reflecting a 0.86% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Ottawa County is the 7th largest county in Michigan. The 2010 population was 264,114 and has grown 17.96% since 2010.
Data after 2023 is projected based on recent change
Overall: 36.5 years
Female: 37.1 years
Male: 35.8 years
There are 231,928 adults, (50,320 of whom are seniors) in Ottawa County.
Female: 151,791 (50.4%)
Male: 149,412 (49.6%)
The racial composition of Ottawa County includes 84.01% White, 3.56% other race, and smaller percentages for Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 253,027 | 84.01% |
| Two or more races | 22,713 | 7.54% |
| Other race | 10,726 | 3.56% |
| Asian | 8,146 | 2.7% |
| Black or African American | 4,821 | 1.6% |
| Native American | 1,563 | 0.52% |
| Native Hawaiian or Pacific Islander | 207 | 0.07% |
Ottawa County 's average per capita income is $54,703. Household income levels show a median of $90,502. The poverty rate stands at 8.31%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $117,935 | $145,893 |
| Families | $109,144 | $134,491 |
| Households | $90,502 | $115,371 |
| Non Families | $47,985 | $63,674 |
Average Income
Median Household Income
Poverty Rate