| Rank | City | 2000 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Cheyenne | 53,411 | 0.6% |
| 2 | Casper | 49,719 | 0.6% |
| 3 | Laramie | 27,298 | 0.2% |
| 4 | Gillette | 20,477 | 1.4% |
| 5 | Rock Springs | 18,588 | -0.3% |
| 6 | Sheridan | 15,899 | 1.3% |
| 7 | Green River | 11,761 | -0.8% |
| 8 | Evanston | 11,474 | 0.4% |
| 9 | Riverton | 9,277 | -0.4% |
| 10 | Rawlins | 9,019 | -0.5% |
| 11 | Cody | 8,894 | 0.7% |
| 12 | Jackson | 8,681 | 5.4% |
| 13 | Lander | 6,929 | 0.6% |
| 14 | Torrington | 5,846 | -0.2% |
| 15 | Powell | 5,585 | 0.8% |
| 16 | Douglas | 5,325 | 0.3% |
| 17 | Worland | 5,308 | -0.9% |
| 18 | Buffalo | 3,924 | 1.3% |
| 19 | Wheatland | 3,524 | 0.8% |
| 20 | Newcastle | 3,264 | -0.1% |
| 21 | Mills | 3,179 | 3.5% |
| 22 | Thermopolis | 3,160 | -0.4% |
| 23 | Kemmerer | 2,646 | -1.5% |
| 24 | Lovell | 2,354 | 0.8% |
| 25 | Evansville | 2,260 | 4.3% |
| 26 | Glenrock | 2,251 | 0.5% |
| 27 | Lyman | 1,933 | 0.2% |
| 28 | Afton | 1,853 | 0.9% |
| 29 | Greybull | 1,806 | 0.2% |
| 30 | Saratoga | 1,720 | -1.3% |
| 31 | Lusk | 1,438 | -0.8% |
| 32 | Pinedale | 1,409 | 1.7% |
| 33 | Wright | 1,357 | 0.9% |
| 34 | Basin | 1,241 | -0.2% |
| 35 | Sundance | 1,211 | 0.5% |
| 36 | Mountain View | 1,162 | 0.4% |
| 37 | Pine Bluffs | 1,155 | 1.1% |
| 38 | Guernsey | 1,139 | -0.1% |
| 39 | Dubois | 972 | 0.8% |
| 40 | Bar Nunn | 937 | 1.1% |
| 41 | Upton | 876 | -0.7% |
| 42 | Hanna | 870 | -1.8% |
| 43 | Moorcroft | 827 | 0.7% |
| 44 | Marbleton | 783 | 2.1% |
| 45 | Diamondville | 715 | -1.9% |
| 46 | Ranchester | 702 | 0.3% |
| 47 | Dayton | 695 | 2.0% |
| 48 | Star Valley Ranch | 651 | – |
| 49 | Shoshoni | 635 | 2.4% |
| 50 | Alpine | 562 | 10.7% |
| 51 | Cowley | 560 | 1.2% |
| 52 | Byron | 555 | 2.7% |
| 53 | Lingle | 510 | 0.6% |
| 54 | Cokeville | 508 | 0.4% |
| 55 | Bear River | 475 | – |
| 56 | Rolling Hills | 458 | 3.1% |
| 57 | Encampment | 441 | – |
| 58 | Hulett | 436 | -0.7% |
| 59 | La Barge | 430 | -2.0% |
| 60 | Big Piney | 428 | -0.6% |
| 61 | Sinclair | 421 | -0.9% |
| 62 | Midwest | 408 | -1.9% |
| 63 | Hudson | 407 | 0.5% |
| 64 | Meeteetse | 351 | -0.5% |
| 65 | Thayne | 351 | 2.8% |
| 66 | Baggs | 348 | 3.4% |
| 67 | La Grange | 336 | 4.1% |
| 68 | Ten Sleep | 312 | 0.0% |
| 69 | Burns | 286 | 0.9% |
| 70 | Medicine Bow | 273 | -3.9% |
| 71 | East Thermopolis | 273 | 2.3% |
| 72 | Wamsutter | 260 | 0.8% |
| 73 | Kaycee | 250 | 0.8% |
| 74 | Burlington | 249 | 2.3% |
| 75 | Superior | 243 | -1.2% |
| 76 | Fort Laramie | 243 | -0.3% |
| 77 | Chugwater | 242 | 2.2% |
| 78 | Rock River | 235 | 0.6% |
| 79 | Glendo | 228 | 1.7% |
| 80 | Pine Haven | 224 | 4.7% |
| 81 | Frannie | 208 | 3.0% |
| 82 | Elk Mountain | 191 | 0.3% |
| 83 | Deaver | 176 | -1.8% |
| 84 | Edgerton | 169 | -3.7% |
| 85 | Yoder | 169 | 2.2% |
| 86 | Pavillion | 165 | 2.7% |
| 87 | Granger | 146 | 3.3% |
| 88 | Albin | 120 | – |
| 89 | Clearmont | 115 | -0.3% |
| 90 | Manderson | 104 | 2.8% |
| 91 | Manville | 102 | – |
| 92 | Opal | 102 | 0.7% |
| 93 | Bairoil | 97 | -8.2% |
| 94 | Dixon | 79 | 3.0% |
| 95 | Hartville | 75 | -0.4% |
| 96 | Riverside | 59 | -1.4% |
| 97 | Kirby | 55 | -0.7% |
| 98 | Van Tassell | 18 | 8.4% |
| 99 | Lost Springs | 1 | -12.9% |
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