Law Enforcement Agencies in Thief River Falls, MN MN › Pennington County Agencies serving the city of Thief River Falls in MN. Agency Types in Thief River Falls Coroners 1 agencies County Jails 1 agencies Municipal Police 1 agencies Sheriff 1 agencies State Police 1 agencies All Agencies in Thief River Falls, MN Minnesota State Patrol Pennington County Pennington County Coroners Office Pennington County Pennington County Jail Pennington County Pennington County Sheriffs Department Pennington County Thief River Falls Police Department Pennington County
