56 Counties — montana
| County | Type | Population | Land area |
|---|
| beaverhead | County | 9,202 | 5,543 sq mi |
| big horn | County | 12,671 | 4,995 sq mi |
| blaine | County | 7,009 | 4,226 sq mi |
| broadwater | County | 4,385 | 1,192 sq mi |
| carbon | County | 9,552 | 2,048 sq mi |
| carter | County | 1,360 | 3,340 sq mi |
| cascade | County | 80,357 | 2,698 sq mi |
| chouteau | County | 5,970 | 3,973 sq mi |
| custer | County | 11,696 | 3,783 sq mi |
| daniels | County | 2,017 | 1,426 sq mi |
| dawson | County | 9,059 | 2,373 sq mi |
| deer lodge | County | 9,417 | 737 sq mi |
| fallon | County | 2,837 | 1,620 sq mi |
| fergus | County | 11,893 | 4,339 sq mi |
| flathead | County | 74,471 | 5,099 sq mi |
| gallatin | County | 67,831 | 2,507 sq mi |
| garfield | County | 1,279 | 4,668 sq mi |
| glacier | County | 13,247 | 2,995 sq mi |
| golden valley | County | 1,042 | 1,175 sq mi |
| granite | County | 2,830 | 1,728 sq mi |
| hill | County | 16,673 | 2,896 sq mi |
| jefferson | County | 10,049 | 1,657 sq mi |
| judith basin | County | 2,329 | 1,870 sq mi |
| lake | County | 26,507 | 1,494 sq mi |
| lewis and clark | County | 55,716 | 3,461 sq mi |
| liberty | County | 2,158 | 1,430 sq mi |
| lincoln | County | 18,837 | 3,613 sq mi |
| madison | County | 6,851 | 3,587 sq mi |
| mccone | County | 1,977 | 2,643 sq mi |
| meagher | County | 1,932 | 2,392 sq mi |
| mineral | County | 3,884 | 1,220 sq mi |
| missoula | County | 95,802 | 2,598 sq mi |
| musselshell | County | 4,497 | 1,867 sq mi |
| park | County | 15,694 | 2,656 sq mi |
| petroleum | County | 493 | 1,654 sq mi |
| phillips | County | 4,601 | 5,140 sq mi |
| pondera | County | 6,424 | 1,625 sq mi |
| powder river | County | 1,858 | 3,297 sq mi |
| powell | County | 7,180 | 2,326 sq mi |
| prairie | County | 1,199 | 1,737 sq mi |
| ravalli | County | 36,070 | 2,394 sq mi |
| richland | County | 9,667 | 2,084 sq mi |
| roosevelt | County | 10,620 | 2,356 sq mi |
| rosebud | County | 9,383 | 5,012 sq mi |
| sanders | County | 10,227 | 2,762 sq mi |
| sheridan | County | 4,105 | 1,677 sq mi |
| silver bow | County | 34,606 | 718 sq mi |
| stillwater | County | 8,195 | 1,795 sq mi |
| sweet grass | County | 3,609 | 1,855 sq mi |
| teton | County | 6,445 | 2,273 sq mi |
| toole | County | 5,267 | 1,911 sq mi |
| treasure | County | 861 | 979 sq mi |
| valley | County | 7,675 | 4,921 sq mi |
| wheatland | County | 2,259 | 1,423 sq mi |
| wibaux | County | 1,068 | 889 sq mi |
| yellowstone | County | 129,352 | 2,635 sq mi |