Montana — All 56 Counties

Montana has 56 counties with 485 communities and a combined population of 779,550.

CountyTownsPopulation
Yellowstone County13135,591
Missoula County1796,705
Gallatin County1886,509
Cascade County2371,315
Lewis and Clark County1865,781
Flathead County2464,551
Silver Bow County235,589
Lake County2315,264
Hill County2013,109
Park County1412,490
Ravalli County1012,187
Glacier County1510,323
Lincoln County159,817
Deer Lodge County19,512
Jefferson County109,010
Big Horn County108,584
Custer County28,413
Richland County57,756
Fergus County177,527
Dawson County57,026
Rosebud County66,867
Carbon County155,702
Blaine County105,276
Broadwater County75,146
Roosevelt County64,951
Beaverhead County124,769
Sanders County134,768
Chouteau County124,604
Pondera County104,406
Stillwater County74,201
Toole County63,912
Powell County83,638
Valley County13,194
Teton County83,075
Mineral County82,587
Madison County132,527
Phillips County92,441
Musselshell County62,435
Sheridan County82,226
Golden Valley County91,967
Fallon County21,815
Sweet Grass County21,624
Granite County41,467
Wheatland County71,308
Liberty County61,276
Meagher County21,131
Daniels County4905
Prairie County2735
Wibaux County1686
Judith Basin County9633
McCone County3605
Powder River County2459
Carter County2383
Treasure County1300
Garfield County1299
Petroleum County1173