Ionia County
Also known as Ionia County, Michigan, Ionia County, MI
county in Michigan, United States
Key facts
- Country
- United States
- State
- Michigan
- Founded
- March 2, 1831 (created), 1837 (organized)
- Named after
- Ionia
- Seat
- Ionia
- Largest city
- Ionia
- Total
- 580 sq mi (1,500 km )
- Land
- 571 sq mi (1,480 km )
- Water
- 8.7 sq mi (23 km ) 1.5%
- Estimate 2025
- 66,557
- Density
- 117/sq mi (45.2/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
~10 min read
Article
Ionia County (/aɪˈoʊnjə/ eye-OH-nyə) is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 66,804. The county seat is Ionia. The Ionia County Courthouse was designed by Claire Allen, a prominent southern Michigan architect.
Ionia County is part of the Grand Rapids-Kentwood metropolitan statistical area.