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 2, 2026.
Mille Lacs County, Minnesota, has about 28,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Mille Lacs County is held at the county jail, run by the Mille Lacs 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: Mille Lacs County public records, Mille Lacs County arrest records, Mille Lacs County warrants, Mille Lacs County criminal records, Mille Lacs County court records, Minnesota arrest records and Minnesota inmate search.
Finding Someone in Custody in Mille Lacs County
A person kept in custody after an arrest in Mille Lacs County is held at the county jail, run by the Mille Lacs County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Mille Lacs County Sheriff's Office at incustody.co.mille-lacs.mn.us/InmateLocator (page title: Mille Lacs County | Inmate Locator), 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 Mille Lacs County Jail by the Numbers
On an average day in 2021 the jail held about 43 people, down from about 72 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 149 beds, and it ran at 48 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Mille Lacs County has about 28,000 residents (2024 Census Bureau estimate), so the jail holds about 16 people for every 10,000 residents.
Who Books People Into the Mille Lacs County Jail
The Mille Lacs County Sheriff's Office and the agencies that report for Princeton, Milaca, Onamia and Isle make the arrests that end in a booking in Mille Lacs County.
The largest arrest counts reported to the FBI were the Mille Lacs County Sheriff's Office's 407 for 2025, Princeton's 174 for 2025 and Milaca's 62 for 2025.
Together, the four agencies in Mille Lacs County with all twelve months of 2025 on file reported 686 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 Mille Lacs County arrest records.
Frequently Asked Questions
How do I find an inmate in Mille Lacs County?
Look on the custody page of the Mille Lacs County Sheriff's Office at incustody.co.mille-lacs.mn.us/InmateLocator. It covers people booked into the county jail.
How many people are in the Mille Lacs County jail?
About 43 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 149 beds.
Is this the official Mille Lacs 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.