List of law enforcement agencies in Montana

The Montana Department of Corrections is a state agency of Montana that operates state prisons and manages community-corrections programs. The agency has its headquarters in Helena.

The Montana Highway Patrol (MHP) is the highway patrol agency for the U.S. state of Montana, which has jurisdiction anywhere in the state over Montana Traffic law.

The Montana Department of Fish, Wildlife and Parks (MFWP) 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. The agency engages in law enforcement activities to enforce laws and regulations regarding fish, wildlife, and state parks, and encourages safe recreational use of these resources.

The Montana Department of Transportation (MDT) 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. While most of MDT's programs relate to the state's highway network, Montana's railroads and airports are also under the agency's purview.