Montana county jails
56 counties
| County | Jail / facility | Phone |
|---|---|---|
| Beaverhead County | Beaverhead County Detention Center | — |
| Big Horn County | Big Horn County Jail | — |
| Blaine County | Blaine County Jail | — |
| Broadwater County | Broadwater County Jail | — |
| Carbon County | Carbon County Jail | — |
| Carter County | Carter County Jail | — |
| Cascade County | Cascade County Detention Center | — |
| Chouteau County | Chouteau County Jail | — |
| Custer County | Custer County Jail | — |
| Daniels County | Daniels County Jail | — |
| Dawson County | Dawson County Correctional Facility | — |
| Deer Lodge County | Anaconda-Deer Lodge County Detention Center | — |
| Fallon County | Fallon County Jail | — |
| Fergus County | Fergus County Detention Center | — |
| Flathead County | Flathead County Detention Center | — |
| Gallatin County | Gallatin County Detention Center | — |
| Garfield County | Garfield County Jail | — |
| Glacier County | Glacier County Jail | — |
| Golden Valley County | Golden Valley County Jail | — |
| Granite County | Granite County Jail | — |
| Hill County | Hill County Detention Center | — |
| Jefferson County | Jefferson County Detention Center | — |
| Judith Basin County | Judith Basin County Jail | — |
| Lake County | Lake County Detention Center | — |
| Lewis and Clark County | Lewis and Clark County Detention Center | — |
| Liberty County | Liberty County Jail | — |
| Lincoln County | Lincoln County Detention Center | — |
| Madison County | Madison County Detention Center | — |
| McCone County | McCone County Jail | — |
| Meagher County | Meagher County Jail | — |
| Mineral County | Mineral County Jail | — |
| Missoula County | Missoula County Detention Facility | — |
| Musselshell County | Musselshell County Jail | — |
| Park County | Park County Detention Center | — |
| Petroleum County | Petroleum County Jail | — |
| Phillips County | Phillips County Jail | — |
| Pondera County | Pondera County Jail | — |
| Powder River County | Powder River County Jail | — |
| Powell County | Powell County Jail | — |
| Prairie County | Prairie County Jail | — |
| Ravalli County | Ravalli County Detention Center | — |
| Richland County | Richland County Jail | — |
| Roosevelt County | Roosevelt County Jail | — |
| Rosebud County | Rosebud County Jail | — |
| Sanders County | Sanders County Jail | — |
| Sheridan County | Sheridan County Jail | — |
| Silver Bow County | Butte-Silver Bow Detention Center | — |
| Stillwater County | Stillwater County Jail | — |
| Sweet Grass County | Sweet Grass County Jail | — |
| Teton County | Teton County Jail | — |
| Toole County | Toole County Detention Center | — |
| Treasure County | Treasure County Jail | — |
| Valley County | Valley County Jail | — |
| Wheatland County | Wheatland County Jail | — |
| Wibaux County | Wibaux County Jail | — |
| Yellowstone County | Yellowstone County Detention Facility | — |