List of law enforcement agencies in Montana

• Montana Department of Corrections • Montana Department of Justice • Montana Highway Patrol • Division of Criminal Investigations • Gambling Control Division • Investigation Bureau • Montana Department of Livestock • Brands Enforcement Division • Montana Department of Fish, Wildlife, and Parks • Law Enforcement Bureau • Montana Department of Transportation • Motor Carrier Services • Enforcement Bureau ==County agencies==

• Beaverhead County Sheriff's Office • Big Horn County Sheriff's Office • Blaine County Sheriff's Office • Broadwater County Sheriff's Office • Carbon County Sheriff's Office • Carter County Sheriff's Office • Cascade County Sheriff's Office • Chouteau County Sheriff's Office • Custer County Sheriff's Office • Daniels County Sheriff's Office • Dawson County Sheriff's Office • Fallon County Sheriff's Office • Fergus County Sheriff's Office • Flathead County Sheriff's Office • Gallatin County Sheriff's Office • Garfield County Sheriff's Office • Glacier County Sheriff's Office • Golden Valley County Sheriff's Office • Granite County Sheriff's Office • Hill County Sheriff's Office • Jefferson County Sheriff's Office • Judith Basin County Sheriff's Office • Lake County Sheriff's Office • Lewis and Clark County Sheriff's Office • Liberty County Sheriff's Office • Lincoln County Sheriff's Office • Madison County Sheriff's Office • McCone County Sheriff's Office • Meagher County Sheriff's Office • Mineral County Sheriff's Office • Missoula County Sheriff's Office • Musselshell County Sheriff's Office • Park County Sheriff's Office • Petroleum County Sheriff's Office • Phillips County Sheriff's Office • Pondera County Sheriff's Office • Powder River County Sheriff's Office • Powell County Sheriff's Office • Prairie County Sheriff's Office • Ravalli County Sheriff's Office • Richland County Sheriff's Office • Roosevelt County Sheriff's Office • Rosebud County Sheriff's Office • Sanders County Sheriff's Office • Sheridan County Sheriff's Office • Stillwater County Sheriff's Office • Sweet Grass County Sheriff's Office • Teton County Sheriff's Office • Toole County Sheriff's Office • Treasure County Sheriff's Office • Valley Treasure County Sheriff's Office • Wheatland County Sheriff's Office • Wibaux County Sheriff's Office • Yellowstone County Sheriff's Office ==Combined city and county agencies==

• Anaconda-Deer Lodge County Law Enforcement Department • Butte-Silver Bow Law Enforcement Department ==City agencies==

• Baker Police Department • Belgrade Police Department • Billings Police Department • Boulder Police Department • Bozeman Police Department • Bridger Police Department • Chinook Police Department • Colstrip Police Department • Columbia Falls Police Department • Columbus Police Department • Conrad Police Department • Cut Bank Police Department • Darby Police Department • Deer Lodge Police Department • Dillon Police Department • East Helena Police Department • Ennis Police Department • Eureka Police Department • Fairview Police Department • Fort Benton Police Department • Glasgow Police Department • Glendive Police Department • Great Falls Police Department • Hamilton Police Department • Hardin Police Department • Havre Police Department • Helena Police Department • Hot Springs Police Department • Kalispell Police Department • Laurel Police Department • Lewistown Police Department • Libby Police Department • Livingston Police Department • Manhattan Police Department • Miles City Police Department • Missoula Police Department • Plains Police Department • Polson Police Department • Red Lodge Police Department • Ronan Police Department • St. Ignatius Police Department • Sheridan Police Department • Sidney Police Department • Stevensville Police Department • Thompson Falls Police Department • Troy Police Department • West Yellowstone Police Department • Whitefish Police Department • Wolf Point Police Department ==Tribal agencies==

• Blackfeet Law Enforcement Services • Blackfeet Nation Fish & Wildlife • Chippewa Cree Law Enforcement Services • Chippewa Cree Tribes Fish & Game • Crow Police Department • Crow Tribe Fish & Game • Confederated Salish and Kootenai Tribal Fish & Game • Confederated Salish and Kootenai Tribal Police Department • Fort Belknap Law Enforcement Services • Fort Belknap Fish & Wildlife Department • Fort Peck Department of Law and Justice • Fort Peck Fish and Wildlife Department ==College and university agencies==

• Montana State University Police Department • Montana State University Billings Police Department • University of Montana Police Department ==Airport agencies==

• Bert Mooney Airport Authority Police • Gallatin Airport Authority Department of Public Safety • Great Falls International Airport Authority Police Department • Billings Logan International Airport Police Department • Missoula County Airport Authority Public Safety Department ==References==