Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and October 9, 2026.
Ionia County, Michigan, has about 66,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Ionia County is held at the county jail, run by the Ionia County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Ionia County public records, Ionia County arrest records, Ionia County warrants, Ionia County criminal records, Ionia County court records, Michigan arrest records and Michigan inmate search.
Finding Someone in Custody in Ionia County
A person kept in custody after an arrest in Ionia County is held at the county jail, run by the Ionia County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Ionia County Sheriff's Office at ioniacounty.org/public-safety/sheriff/correctional-center (page title: Ionia County Correctional Center | Ionia County), phone (616) 527-5737, 133 Adams Street Ionia, MI 48846, Monday - Friday 8:30 AM - 4:30 PM, which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at (616) 527-5737.
The Ionia County Jail by the Numbers
On an average day in 2020 the jail held about 76 people, down from about 160 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 156 beds, and it ran at 99 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Ionia County has about 66,000 residents (2024 Census Bureau estimate), so the jail holds about 12 people for every 10,000 residents.
Who Books People Into the Ionia County Jail
The Ionia County Sheriff's Office and the agencies that report for Ionia, Belding, Portland and Lake Odessa make the arrests that end in a booking in Ionia County.
The FBI's agency list also places one more agency in Ionia County: the Ionia County State Police (state police).
The largest arrest counts reported to the FBI were the Ionia County Sheriff's Office's 686 for 2024, Ionia's 264 for 2025 and Belding's 132 for 2025.
Together, the three agencies in Ionia County with all twelve months of 2025 on file reported 469 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Ionia County arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Ionia County serves the sentence in a facility of the Michigan Department of Corrections, whose inmate locator is at mdocweb.state.mi.us/otis2.
Frequently Asked Questions
How do I find an inmate in Ionia County?
Ask the Ionia County Sheriff's Office at (616) 527-5737; its jail page SearchSystems verified is at ioniacounty.org.
How many people are in the Ionia County jail?
About 76 on an average day in 2020, the latest year in the Vera Institute's jail data, against a rated capacity of 156 beds.
What is the phone number for the Ionia County jail?
(616) 527-5737, the number on the page of the Ionia County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Ionia County go?
To a facility of the Michigan Department of Corrections; its inmate locator is at mdocweb.state.mi.us/otis2.
Is this the official Ionia County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.