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 24, 2026.
Rosebud County, Montana, has about 8,200 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Rosebud County is held at the county jail, run by the Rosebud 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: Rosebud County public records, Rosebud County arrest records, Rosebud County warrants, Rosebud County criminal records, Rosebud County court records, Montana arrest records and Montana inmate search.
Finding Someone in Custody in Rosebud County
The county jail, run by the Rosebud County Sheriff's Office, holds everyone kept in custody after an arrest in Rosebud County, from every agency.
SearchSystems opened and checked the jail page of the Rosebud County Sheriff's Office at rosebudcountymt.gov/departments/sheriff (page title: Sheriff | Rosebud CountyRosebud County), phone 406-346-2715, 3212 Address Forsyth 180 S 13th Ave PO Box 85 Forsyth MT 59327, Tuesday 5:30 p.m. to 9:30 p.m., which answered when SearchSystems opened it on September 24, 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 406-346-2715.
The Rosebud County Jail by the Numbers
On an average day in 2021 the jail held about 17 people, up from about 13 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 13 beds, and it ran at 100 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Rosebud County has about 8,200 residents (2024 Census Bureau estimate), so the jail holds about 21 people for every 10,000 residents.
Who Books People Into the Rosebud County Jail
The Rosebud County Sheriff's Office and the agency that reports for Colstrip make the arrests that end in a booking in Rosebud County.
The largest arrest counts reported to the FBI were the Rosebud County Sheriff's Office's 35 for 2025 and Colstrip's 28 for 2025.
Together, the two agencies in Rosebud County with all twelve months of 2025 on file reported 63 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 Rosebud 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 Rosebud County serves the sentence in a facility of the Montana Department of Corrections, whose inmate locator is at offendersearch.mt.gov/conweb.
Frequently Asked Questions
How do I find an inmate in Rosebud County?
Ask the Rosebud County Sheriff's Office at 406-346-2715; its jail page SearchSystems verified is at rosebudcountymt.gov/departments/sheriff.
How many people are in the Rosebud County jail?
About 17 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 13 beds.
What is the phone number for the Rosebud County jail?
406-346-2715, the number on the page of the Rosebud County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Rosebud County go?
To a facility of the Montana Department of Corrections; its inmate locator is at offendersearch.mt.gov/conweb.
Is this the official Rosebud 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.