COUNTY · MI
Ionia County, Michigan
Ionia County is a county in Michigan with FIPS code 26067 and an estimated population of 66,262 (Census 2023), 30th largest of 83 in the state.
County facts
- Name
- Ionia County
- State
- Michigan
- Type
- county
- FIPS code
- 26067
- State FIPS
- 26
- Population (2023)
- 66,262
- Change since 2020
- -0.9%
- State rank
- 30 of 83
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Ionia County?
Ionia County, Michigan has the five-digit FIPS code 26067: 26 for the state and 067 for the county.
What state is Ionia County in?
Ionia 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.