| Rank | City | 2020 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Billings | 117,026 | 1.2% |
| 2 | Missoula | 73,949 | 1.0% |
| 3 | Great Falls | 60,420 | 0.3% |
| 4 | Bozeman | 53,119 | 3.6% |
| 5 | Butte-Silver Bow | 34,530 | 0.3% |
| 6 | Helena | 32,362 | 1.4% |
| 7 | Kalispell | 24,602 | 2.1% |
| 8 | Belgrade | 10,755 | 3.8% |
| 9 | Anaconda-Deer Lodge County | 9,413 | 0.1% |
| 10 | Havre | 9,358 | 0.1% |
| 11 | Miles City | 8,357 | -0.1% |
| 12 | Livingston | 8,223 | 1.6% |
| 13 | Whitefish | 7,848 | 2.1% |
| 14 | Laurel | 7,221 | 0.7% |
| 15 | Sidney | 6,331 | 2.0% |
| 16 | Lewistown | 5,962 | 0.1% |
| 17 | Columbia Falls | 5,362 | 1.4% |
| 18 | Polson | 5,222 | 1.5% |
| 19 | Glendive | 4,882 | -0.1% |
| 20 | Hamilton | 4,683 | 0.7% |
| 21 | Dillon | 3,879 | -0.6% |
| 22 | Hardin | 3,714 | 0.6% |
| 23 | Glasgow | 3,177 | -0.2% |
| 24 | Shelby | 3,122 | -0.8% |
| 25 | Cut Bank | 3,039 | 0.6% |
| 26 | Deer Lodge | 2,921 | -0.6% |
| 27 | Libby | 2,759 | 0.5% |
| 28 | Wolf Point | 2,602 | -0.1% |
| 29 | Conrad | 2,311 | -1.1% |
| 30 | Red Lodge | 2,233 | 0.5% |
| 31 | Manhattan | 2,102 | 3.3% |
| 32 | Colstrip | 2,096 | -0.5% |
| 33 | Ronan | 2,035 | 0.8% |
| 34 | Stevensville | 2,001 | 1.0% |
| 35 | Three Forks | 1,993 | 0.6% |
| 36 | East Helena | 1,935 | -0.2% |
| 37 | Columbus | 1,849 | -0.2% |
| 38 | Malta | 1,845 | -0.8% |
| 39 | Townsend | 1,803 | -0.4% |
| 40 | Baker | 1,791 | 0.3% |
| 41 | Roundup | 1,748 | -0.2% |
| 42 | Choteau | 1,711 | 0.2% |
| 43 | Plentywood | 1,664 | -0.4% |
| 44 | Big Timber | 1,649 | 0.0% |
| 45 | Forsyth | 1,626 | -0.9% |
| 46 | Fort Benton | 1,512 | 0.3% |
| 47 | Eureka | 1,379 | 2.9% |
| 48 | Thompson Falls | 1,337 | 0.2% |
| 49 | West Yellowstone | 1,270 | -0.0% |
| 50 | Boulder | 1,185 | 0.0% |
| 51 | Chinook | 1,177 | -0.2% |
| 52 | Plains | 1,113 | 0.6% |
| 53 | Harlowton | 1,108 | 1.1% |
| 54 | White Sulphur Springs | 1,032 | 0.9% |
| 55 | Whitehall | 1,013 | -0.2% |
| 56 | Scobey | 1,008 | -0.1% |
| 57 | Browning | 1,005 | -0.1% |
| 58 | Ennis | 937 | 1.1% |
| 59 | Fairview | 898 | 0.7% |
| 60 | Chester | 847 | – |
| 61 | Philipsburg | 839 | 0.2% |
| 62 | Superior | 836 | 0.3% |
| 63 | Pinesdale | 810 | -1.2% |
| 64 | Troy | 802 | -1.6% |
| 65 | Darby | 792 | 1.0% |
| 66 | Poplar | 770 | -0.5% |
| 67 | St. Ignatius | 769 | -0.9% |
| 68 | Harlem | 768 | -0.5% |
| 69 | Fairfield | 751 | 0.6% |
| 70 | Culbertson | 749 | 0.5% |
| 71 | Sheridan | 710 | 1.0% |
| 72 | Bridger | 667 | -0.6% |
| 73 | Walkerville | 638 | -0.6% |
| 74 | Cascade | 602 | -1.3% |
| 75 | Big Sandy | 597 | -0.0% |
| 76 | Circle | 593 | -0.4% |
| 77 | Joliet | 583 | -0.2% |
| 78 | Hot Springs | 565 | 0.4% |
| 79 | Terry | 558 | -0.8% |
| 80 | Belt | 515 | -1.5% |
| 81 | Valier | 486 | -0.5% |
| 82 | Broadus | 465 | -0.1% |
| 83 | Wibaux | 454 | -2.6% |
| 84 | Alberton | 451 | 0.7% |
| 85 | Lodge Grass | 443 | 0.3% |
| 86 | Stanford | 414 | 0.3% |
| 87 | Fromberg | 396 | -1.0% |
| 88 | Ekalaka | 395 | 1.8% |
| 89 | Sunburst | 359 | -0.4% |
| 90 | Jordan | 341 | -0.1% |
| 91 | Clyde Park | 335 | 1.5% |
| 92 | Twin Bridges | 332 | -1.2% |
| 93 | Nashua | 299 | 0.3% |
| 94 | Dutton | 296 | -0.7% |
| 95 | Drummond | 277 | -1.1% |
| 96 | Bainville | 276 | 2.9% |
| 97 | Hysham | 275 | -1.3% |
| 98 | Medicine Lake | 244 | 0.8% |
| 99 | Fort Peck | 240 | 0.3% |
| 100 | Ryegate | 228 | -0.7% |
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