COUNTY · MI
Ottawa County, Michigan
Ottawa County is a county in Michigan with FIPS code 26139 and an estimated population of 303,372 (Census 2023), 7th largest of 83 in the state.
County facts
- Name
- Ottawa County
- State
- Michigan
- Type
- county
- FIPS code
- 26139
- State FIPS
- 26
- Population (2023)
- 303,372
- Change since 2020
- +2.2%
- State rank
- 7 of 83
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Ottawa County?
Ottawa County, Michigan has the five-digit FIPS code 26139: 26 for the state and 139 for the county.
What state is Ottawa County in?
Ottawa County is in Michigan.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.