Counties in Montana Yellowstone County (Billings) Gallatin County (Bozeman) Missoula County (Missoula) Flathead County (Kalispell) Cascade County (Great Falls) Lewis and Clark County (Helena) Ravalli County (Hamilton) Silver Bow County (Butte) Lake County (Polson) Lincoln County (Libby) Park County (Livingston) Hill County (Havre) Glacier County (Cut Bank) Big Horn County (Hardin) Sanders County (Thompson Falls) Jefferson County (Boulder) Custer County (Miles City) Richland County (Sidney) Fergus County (Lewistown) Roosevelt County (Wolf Point) Carbon County (Red Lodge) Deer Lodge County (Anaconda) Beaverhead County (Dillon) Stillwater County (Columbus) Dawson County (Glendive) Madison County (Virginia City) Rosebud County (Forsyth) Valley County (Glasgow) Blaine County (Chinook) Powell County (Deer Lodge) Broadwater County (Townsend) Teton County (Choteau) Pondera County (Conrad) Chouteau County (Fort Benton) Toole County (Shelby) Musselshell County (Roundup) Mineral County (Superior) Phillips County (Malta) Sweet Grass County (Big Timber) Sheridan County (Plentywood) Granite County (Philipsburg) Fallon County (Baker) Wheatland County (Harlowton) Judith Basin County (Stanford) Liberty County (Chester) Meagher County (White Sulphur Springs) McCone County (Circle) Powder River County (Broadus) Daniels County (Scobey) Carter County (Ekalaka) Garfield County (Jordan) Prairie County (Terry) Wibaux County (Wibaux) Golden Valley County (Ryegate) Treasure County (Hysham) Petroleum County (Winnett)