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 September 30, 2026.
Mount Pleasant, Michigan, in Isabella County, has about 21,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Mount Pleasant is held at the county jail, run by the Isabella 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: Mount Pleasant public records, Isabella County inmate search, Mount Pleasant arrest records, Mount Pleasant warrants, Mount Pleasant criminal records, Mount Pleasant court records, Michigan arrest records and Michigan inmate search.
Finding Someone in Custody in Mount Pleasant
A person kept in custody after an arrest in Mount Pleasant is held at the county jail, run by the Isabella County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Isabella County Sheriff's Office at isabellacounty.org/law-justice/sheriffs-office/jail-inmate-services... (page title: Inmate Search | Isabella County Michigan), phone (989) 772-5915, 5270 E. Remus Rd. Mt. Pleasant, MI 48858, which answered when SearchSystems opened it on September 23, 2026.
That page is the place to look for someone booked recently. A person cited and released at the scene, or held only a few hours by a city department, will not be on it.
The Isabella County Jail by the Numbers
On an average day in 2022 the jail held about 140 people, down from about 170 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 196 beds, and it ran at 88 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Isabella County has about 65,000 residents (2024 Census Bureau estimate), so the jail holds about 21 people for every 10,000 residents.
Who Books People Into the Isabella County Jail
The Isabella County Sheriff's Office and the agency that reports for Mount Pleasant (filed by the FBI as Mount Pleasant Police Department) make the arrests that end in a booking in and around Mount Pleasant.
The FBI's agency list also places these agencies in Isabella County: Central Michigan University (campus police); the Isabella County State Police (state police).
The Clare Police Department is listed by the FBI across two counties including Isabella County, so its arrests are not broken out for Isabella County here.
The largest arrest counts reported to the FBI were Mount Pleasant's 846 for 2025, the Isabella County Sheriff's Office's 357 for 2023 and Shepherd's 1 for 2025.
Together, the two agencies in Isabella County with all twelve months of 2025 on file reported 847 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 Mount Pleasant arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Michigan Department of Corrections lists its inmates at mdocweb.state.mi.us/otis2.
Frequently Asked Questions
How do I find an inmate in Mount Pleasant?
Look on the custody page of the Isabella County Sheriff's Office at isabellacounty.org, or call (989) 772-5915. It covers people booked into the county jail.
How many people are in the Isabella County jail?
About 140 on an average day in 2022, the latest year in the Vera Institute's jail data, against a rated capacity of 196 beds.
What is the phone number for the Isabella County jail?
(989) 772-5915, the number on the page of the Isabella County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Isabella 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 Mount Pleasant website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.