State agencies

• Montana Department of Corrections
• Montana Department of Fish, Wildlife, and Parks
  Montana Department of Fish, Wildlife and Parks
  The Montana Department of Fish, Wildlife and Parks is a government agency in the executive branch state of Montana in the United States with responsibility for protecting sustainable fish, wildlife, and state-owned park resources in Montana for the purpose of providing recreational activities...
  
  
• Montana Department of Justice – Division of Criminal Investigations
  Montana Department of Justice
  The Montana Department of Justice is a state law enforcement agency of Montana.The Montana Attorney General heads the agency.-Responsibilities:The Attorney General serves as 1 of 5 members of the state Land Board...
  
  
• Montana Department of Justice – Fire Prevention and Investigation
  Montana Department of Justice
  The Montana Department of Justice is a state law enforcement agency of Montana.The Montana Attorney General heads the agency.-Responsibilities:The Attorney General serves as 1 of 5 members of the state Land Board...
  
  
• Montana Department of Justice – Gambling Investigation Bureau
  Montana Department of Justice
  The Montana Department of Justice is a state law enforcement agency of Montana.The Montana Attorney General heads the agency.-Responsibilities:The Attorney General serves as 1 of 5 members of the state Land Board...
  
  
• Montana Department of Livestock
• Montana Department of Transportation Commercial Motor Carriers
  Montana Department of Transportation
  The Montana Department of Transportation is a governmental agency in the U.S. state of Montana, responsible for numerous programs related to the construction, maintenance, and monitoring of Montana's transportation infrastructure and operations...
  
  
• Montana Highway Patrol
  Montana Highway Patrol
  The Montana Highway Patrol is the highway patrol agency for Montana, which has jurisdiction anywhere in the state. It was created to protect the lives, property and constitutional rights of people in Montana.-History:...
  
  

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
• 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 Law Enforcement Agency

• Butte-Silverbow Police Department

City agencies

• Baker Police Department
• Belgrade Police Department
• Billings Police Department
  Billings Police Department
  The Billings Police Department is a police department in Billings, Montana, the main law enforcement service in Billings, Montana. It is the largest city police force in Montana with about 142 sworn officers/80 civilian employees covering and a population of about 105,000...
  
  
• Boulder Police Department
• Bozeman Police Department
• Bridger Police Department
• Brockton 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
• Dillon Police Department
• East Helena Police Department
• Ennis Police Department
• Eureka Police Department
• Fairview Police Department
• Fort Benton Police Department
• Fromberg Police Department
• Glasgow Police Department
• Glendive Police Department
• Great Falls Police Department
• Hamilton Police Department
• Havre Police Department

• Helena Police Department
• Hot Springs Police Department
• Joliet 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
• Pinesdale Police Department
• Plains Police Department

• Polson Police Department
• Poplar Police Department
• Red Lodge Police Department
• Ronan Police Department
• Sidney Police Department
• St. Ignatius Police Department
• Stevensville Police Department
• Thompson Falls Police Department
• Three Forks Police Department
• Troy Police Department
• West Yellowstone Police Department
• Whitefish Police Department
• Wolf Point Police Department

Tribal agencies

• Bureau of Indian Affairs Office of Justice Services, Crow Agency
• Blackfeet Law Enforcement Services
• Flathead Tribal Police Department
• Fort Belknap Tribal Police Department

• Fort Peck Tribes Department of Law and Justice Police
• Northern Cheyenne Agency
• Rocky Boy Tribal Law Enforcement Agency

College and University agencies

• Montana State University Police Departmenthttp://www.montana.edu/wwwmsupd/
• University of Montana Office of Public Securityhttp://www.umt.edu/publicsafety/

Airport agencies

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