Law Enforcement Agencies in De Smet, MT MT › Missoula County Agencies serving the city of De Smet in MT. Agency Types in De Smet Adult Institutions 1 agencies Airport Police 1 agencies County Jails 1 agencies State Police 1 agencies All Agencies in De Smet, MT Missoula Correctional Services Inc Missoula County Missoula County Detention Facility Missoula County Missoula International Airport Missoula County Montana Highway Patrol Missoula County
