Custer Region
Big Horn County, Carter County, Custer County, Dawson County, Fallon County, Golden Valley County, Musselshell County, Powder River County, Prairie County, Rosebud County, Treasure County, Wibaux County, Yellowstone County
Glacier Region
Flathead County, Glacier County, Lake County, Lincoln County, Mineral County, Missoula County, Ravalli County, Sanders County
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Gold West Region
Beaverhead County, Broadwater County, Deer Lodge County, Granite County, Jefferson County, Lewis and Clark County, Madison County, Powell County, Silver Bow County
Missouri River Region
Daniels County, Garfield County, McCone County, Phillips County, Richland County, Roosevelt County, Sheridan County, Valley County
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Russell Region
Blaine County, Cascade County, Chouteau County, Fergus County, Hill County, Judith Basin County, Liberty County, Meagher County, Petroleum County, Pondera County, Teton County, Toole County, Wheatland County
Yellowstone Region
Carbon County, Gallatin County, Park County, Stillwater County, Sweet Grass County
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Regions in Montana:
(with names of Districts/Counties in each region)