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.
Mackinac County, Michigan, has about 11,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Mackinac County is held at the county jail, run by the Mackinac 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: Mackinac County public records, Mackinac County arrest records, Mackinac County warrants, Mackinac County criminal records, Mackinac County court records, Michigan arrest records and Michigan inmate search.
Finding Someone in Custody in Mackinac County
The county jail, run by the Mackinac County Sheriff's Office, holds everyone kept in custody after an arrest in Mackinac County, from every agency.
SearchSystems opened and checked the jail page of the Mackinac County Sheriff's Office at mackinaccounty.net/departments/sheriffs-office (page title: Sheriff’s Office | Mackinac County), phone (906) 643-1911, 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 (906) 643-1911.
The Mackinac County Jail by the Numbers
On an average day in 2020 the jail held about 10 people, down from about 18 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 25 beds, and it ran at 72 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Mackinac County has about 11,000 residents (2024 Census Bureau estimate), so the jail holds about 9 people for every 10,000 residents.
Who Books People Into the Mackinac County Jail
The Mackinac County Sheriff's Office and the agencies that report for St. Ignace and Mackinac Island make the arrests that end in a booking in Mackinac County.
The FBI's agency list also places one more agency in Mackinac County: the Mackinac County State Police (state police).
The largest arrest counts reported to the FBI were the Mackinac County Sheriff's Office's 36 for 2025, St. Ignace's 14 for 2024 and Mackinac Island's 6 for 2025.
Together, the two agencies in Mackinac County with all twelve months of 2025 on file reported 42 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 Mackinac County 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 Mackinac County?
Ask the Mackinac County Sheriff's Office at (906) 643-1911; its jail page SearchSystems verified is at mackinaccounty.net.
How many people are in the Mackinac County jail?
About 10 on an average day in 2020, the latest year in the Vera Institute's jail data, against a rated capacity of 25 beds.
What is the phone number for the Mackinac County jail?
(906) 643-1911, the number on the page of the Mackinac County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Mackinac 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 Mackinac 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.