High Quality Content by WIKIPEDIA articles! The U.S. state of Montana began requiring its residents to register their vehicles and display license plates on their cars in 1915.1: Silver Bow (Butte) 2: Cascade (Great Falls) 3: Yellowstone (Billings) 4: Missoula (Missoula) 5: Lewis & Clark (Helena) 6: Gallatin (Bozeman) 7: Flathead (Kalispell) 8: Fergus (Lewistown) 9: Powder River (Broadus) 10: Carbon (Red Lodge) 11: Phillips (Malta) 12: Hill (Havre) 13: Ravalli (Hamilton) 14: Custer (Miles City) 15: Lake (Polson) 16: Dawson (Glendive) 17: Roosevelt (Wolf Point) 18: Beaverhead (Dillon) 19: Chouteau (Fort Benton)...