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 on September 23, 2026.
Martin County, Minnesota, has about 20,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Martin County is held at the county jail, run by the Martin 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 and common questions.
Related guides: Martin County public records, Martin County arrest records, Martin County warrants, Martin County criminal records, Martin County court records, Minnesota arrest records and Minnesota inmate search.
Finding Someone in Custody in Martin County
The county jail, run by the Martin County Sheriff's Office, holds everyone kept in custody after an arrest in Martin County, from every agency.
SearchSystems opened and checked the jail page of the Martin County Sheriff's Office at co.martin.mn.us/your_government/departments/sheriff/index.php (page title: Martin County), which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster.
The Martin County Jail by the Numbers
On an average day in 2020 the jail held about 21 people, down from about 31 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 26 beds, and it ran at 119 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Martin County has about 20,000 residents (2024 Census Bureau estimate), so the jail holds about 11 people for every 10,000 residents.
Who Books People Into the Martin County Jail
The Martin County Sheriff's Office and the agencies that report for Fairmont, Sherburn and Trimont make the arrests that end in a booking in Martin County.
The largest arrest counts reported to the FBI were Fairmont's 378 for 2025, the Martin County Sheriff's Office's 37 for 2025 and Sherburn's 11 for 2024.
Together, the four agencies in Martin County with all twelve months of 2024 on file reported 331 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 Martin County arrest records.
Frequently Asked Questions
How do I find an inmate in Martin County?
Ask the Martin County Sheriff's Office; its jail page SearchSystems verified is at co.martin.mn.us.
How many people are in the Martin County jail?
About 21 on an average day in 2020, the latest year in the Vera Institute's jail data, against a rated capacity of 26 beds.
Is this the official Martin 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.