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.
Mineral County, Montana, has about 5,200 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Mineral County is held at the county jail, run by the Mineral 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: Mineral County public records, Mineral County arrest records, Mineral County warrants, Mineral County criminal records, Mineral County court records, Montana arrest records and Montana inmate search.
Finding Someone in Custody in Mineral County
The county jail, run by the Mineral County Sheriff's Office, holds everyone kept in custody after an arrest in Mineral County, from every agency.
SearchSystems opened and checked the jail page of the Mineral County Sheriff's Office at co.mineral.mt.us/departments/sheriff (page title: Sheriff | Mineral County MT), phone (406) 822-3555, 300 River Street Superior, MT 59872, 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) 822-3555.
The Mineral County Jail by the Numbers
On an average day in 2018 the jail held about 1 people. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Mineral County has about 5,200 residents (2024 Census Bureau estimate), so the jail holds about 2 people for every 10,000 residents.
Who Books People Into the Mineral County Jail
The Mineral County Sheriff's Office makes the arrests that end in a booking in Mineral County.
The Mineral County Sheriff's Office reported 0 arrests to the FBI for 2025. 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 Mineral 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 Montana Department of Corrections lists its inmates at offendersearch.mt.gov/conweb.
Frequently Asked Questions
How do I find an inmate in Mineral County?
Ask the Mineral County Sheriff's Office at (406) 822-3555; its jail page SearchSystems verified is at co.mineral.mt.us/departments/sheriff.
How many people are in the Mineral County jail?
About 1 on an average day in 2018, the latest year in the Vera Institute's jail data.
What is the phone number for the Mineral County jail?
(406) 822-3555, the number on the page of the Mineral County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Mineral County go?
To a facility of the Montana Department of Corrections; its inmate locator is at offendersearch.mt.gov/conweb.
Is this the official Mineral 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.