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 27, 2026 and October 4, 2026.
Powder River County, Montana, has about 1,700 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Powder River County is held at the county jail, run by the Powder River 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: Powder River County public records, Powder River County arrest records, Powder River County warrants, Powder River County criminal records, Powder River County court records, Montana arrest records and Montana inmate search.
Finding Someone in Custody in Powder River County
The county jail, run by the Powder River County Sheriff's Office, holds everyone kept in custody after an arrest in Powder River County, from every agency.
SearchSystems opened and checked the jail page of the Powder River County Sheriff's Office at prco.mt.gov/Sheriff-Office (page title: Powder River County Sheriff's Office), phone (406) 436-2333, Monday, Wednesday, & Friday: 5:00 pm - 7:00 pm, which answered when SearchSystems opened it on October 4, 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) 436-2333.
The Powder River County Jail by the Numbers
On an average day in 2019 the jail held about 2 people. Its rated capacity in 2019 was 16 beds, and it ran at 12 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Powder River County has about 1,700 residents (2024 Census Bureau estimate), so the jail holds about 12 people for every 10,000 residents.
Who Books People Into the Powder River County Jail
The Powder River County Sheriff's Office makes the arrests that end in a booking in Powder River County.
The Powder River County Sheriff's Office reported 6 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 Powder River 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 Powder River 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 Powder River County?
Ask the Powder River County Sheriff's Office at (406) 436-2333; its jail page SearchSystems verified is at prco.mt.gov/Sheriff-Office.
How many people are in the Powder River County jail?
About 2 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 16 beds.
What is the phone number for the Powder River County jail?
(406) 436-2333, the number on the page of the Powder River County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Powder River County go?
To a facility of the Montana Department of Corrections; its inmate locator is at offendersearch.mt.gov/conweb.
Is this the official Powder River 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.