Montana Inmate Search
Official inmate lookup tools, 4 state prisons, all 56 county jail directories, mailing rules, and verified DOC links for Montana.
Montana Department of Corrections
Official inmate locator for individuals in Montana state custody.
State Prisons in Montana
4 state-operated adult correctional facilities. Inmate searches go through the single statewide DOC locator above.
Need full directory details (addresses, phone numbers, visitation)? View official MT DOC facility directory →
County Jails in Montana
All 56 Montana counties. Montana county detention centers publish records individually. Click any county to find its sheriff's official inmate roster.
- Beaverhead County
- Big Horn County
- Blaine County
- Broadwater County
- Carbon County
- Carter County
- Cascade County
- Chouteau County
- Custer County
- Daniels County
- Dawson County
- Deer Lodge County
- Fallon County
- Fergus County
- Flathead County
- Gallatin County
- Garfield County
- Glacier County
- Golden Valley County
- Granite County
- Hill County
- Jefferson County
- Judith Basin County
- Lake County
Sheriff links open a Google search for the official county roster. Each sheriff's office operates its jail independently from the state DOC system. State slug: montana
Mailing Guidance
Use the inmate's full legal name and ID. Always verify mail rules with the specific facility.
Mailing Label Generator →Visitation
Visitation rules vary by facility and security level. Check the official DOC site for schedules, approved visitor lists, and ID requirements.
Deposits / Money
Most states use approved third-party providers for inmate trust deposits. Always verify the official link from the DOC website.
How Montana's correctional system works
Montana maintains a state-level Department of Corrections that holds individuals sentenced to longer terms. County and city jails operate independently from the state system. Federal inmates are not housed in state facilities — search the BOP locator instead.
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· Always confirm details on the official source.
Notice: NmateFinder does not host inmate records. We route users to official sources. Always verify information directly with the relevant government agency.