| Rank | City | 2020 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Cheyenne | 65,161 | 0.9% |
| 2 | Casper | 59,242 | 0.7% |
| 3 | Gillette | 33,458 | 1.4% |
| 4 | Laramie | 31,313 | 0.2% |
| 5 | Rock Springs | 23,481 | 0.2% |
| 6 | Sheridan | 18,821 | 0.8% |
| 7 | Green River | 11,786 | -0.6% |
| 8 | Evanston | 11,742 | -0.5% |
| 9 | Jackson | 10,767 | 1.2% |
| 10 | Riverton | 10,551 | -0.1% |
| 11 | Cody | 10,068 | 0.6% |
| 12 | Rawlins | 8,241 | -1.2% |
| 13 | Lander | 7,520 | 0.0% |
| 14 | Douglas | 6,366 | 0.4% |
| 15 | Powell | 6,353 | 0.1% |
| 16 | Torrington | 6,119 | -0.6% |
| 17 | Worland | 4,757 | -1.4% |
| 18 | Buffalo | 4,373 | -0.5% |
| 19 | Mills | 4,203 | 2.0% |
| 20 | Wheatland | 3,583 | -0.1% |
| 21 | Newcastle | 3,232 | -0.9% |
| 22 | Bar Nunn | 2,994 | 3.1% |
| 23 | Evansville | 2,760 | 0.8% |
| 24 | Thermopolis | 2,721 | -1.0% |
| 25 | Glenrock | 2,418 | -0.6% |
| 26 | Kemmerer | 2,404 | -1.0% |
| 27 | Pinedale | 2,272 | 1.1% |
| 28 | Lovell | 2,227 | -0.6% |
| 29 | Afton | 2,164 | 1.3% |
| 30 | Lyman | 2,142 | 0.1% |
| 31 | Star Valley Ranch | 1,881 | 2.3% |
| 32 | Saratoga | 1,689 | -0.0% |
| 33 | Greybull | 1,660 | -1.1% |
| 34 | Wright | 1,649 | -0.9% |
| 35 | Lusk | 1,498 | -0.4% |
| 36 | Mountain View | 1,281 | -0.0% |
| 37 | Alpine | 1,228 | 4.0% |
| 38 | Basin | 1,219 | -0.5% |
| 39 | Pine Bluffs | 1,166 | 0.3% |
| 40 | Guernsey | 1,129 | -0.2% |
| 41 | Ranchester | 1,062 | 2.2% |
| 42 | Sundance | 1,020 | -1.5% |
| 43 | Moorcroft | 949 | -0.6% |
| 44 | Upton | 922 | -1.7% |
| 45 | Dubois | 910 | -0.6% |
| 46 | Marbleton | 817 | -2.9% |
| 47 | Dayton | 813 | 0.7% |
| 48 | Cowley | 771 | 1.6% |
| 49 | Hanna | 679 | -2.1% |
| 50 | Byron | 562 | -0.5% |
| 51 | Diamondville | 522 | -3.4% |
| 52 | Bear River | 520 | 0.0% |
| 53 | Cokeville | 500 | -0.7% |
| 54 | Pine Haven | 499 | 0.2% |
| 55 | Shoshoni | 474 | -3.1% |
| 56 | Encampment | 448 | -0.0% |
| 57 | Hudson | 438 | -0.4% |
| 58 | Rolling Hills | 425 | -0.3% |
| 59 | Baggs | 402 | -0.9% |
| 60 | La Barge | 399 | -3.2% |
| 61 | Lingle | 399 | -1.6% |
| 62 | Thayne | 386 | 0.5% |
| 63 | Big Piney | 377 | -3.7% |
| 64 | LaGrange | 375 | -1.8% |
| 65 | Sinclair | 372 | -1.5% |
| 66 | Burns | 355 | 1.7% |
| 67 | Burlington | 319 | 1.0% |
| 68 | Meeteetse | 313 | -0.4% |
| 69 | Hulett | 311 | -2.1% |
| 70 | Midwest | 286 | -3.4% |
| 71 | Kaycee | 251 | -0.5% |
| 72 | Ten Sleep | 248 | -0.5% |
| 73 | Medicine Bow | 241 | -1.6% |
| 74 | Glendo | 236 | 1.4% |
| 75 | East Thermopolis | 228 | -1.1% |
| 76 | Pavillion | 225 | -0.3% |
| 77 | Rock River | 216 | -1.3% |
| 78 | Fort Laramie | 208 | -1.0% |
| 79 | Wamsutter | 203 | -7.7% |
| 80 | Superior | 185 | -5.8% |
| 81 | Chugwater | 178 | -1.7% |
| 82 | Albin | 169 | -0.7% |
| 83 | Deaver | 155 | -1.4% |
| 84 | Edgerton | 154 | -2.3% |
| 85 | Elk Mountain | 151 | -2.3% |
| 86 | Frannie | 141 | -1.1% |
| 87 | Yoder | 131 | -1.4% |
| 88 | Clearmont | 114 | -2.2% |
| 89 | Granger | 95 | -3.7% |
| 90 | Manville | 94 | -0.1% |
| 91 | Manderson | 88 | -2.6% |
| 92 | Kirby | 75 | -2.0% |
| 93 | Dixon | 74 | -2.7% |
| 94 | Bairoil | 68 | -4.3% |
| 95 | Hartville | 65 | 0.5% |
| 96 | Opal | 63 | -4.1% |
| 97 | Riverside | 63 | 1.9% |
| 98 | Van Tassell | 23 | 4.4% |
| 99 | Lost Springs | 4 | – |
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