| Rank | City | 2006 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Cheyenne | 55,392 | 0.7% |
| 2 | Casper | 51,389 | 0.7% |
| 3 | Laramie | 27,694 | 0.3% |
| 4 | Gillette | 22,520 | 1.9% |
| 5 | Rock Springs | 18,422 | -0.2% |
| 6 | Sheridan | 16,176 | 0.3% |
| 7 | Green River | 11,534 | -0.4% |
| 8 | Evanston | 11,214 | -0.5% |
| 9 | Riverton | 9,450 | 0.4% |
| 10 | Jackson | 9,176 | 1.1% |
| 11 | Cody | 8,994 | 0.2% |
| 12 | Rawlins | 8,525 | -1.1% |
| 13 | Lander | 6,903 | -0.1% |
| 14 | Torrington | 5,519 | -1.1% |
| 15 | Powell | 5,509 | -0.3% |
| 16 | Douglas | 5,466 | 0.5% |
| 17 | Worland | 4,940 | -1.4% |
| 18 | Buffalo | 4,266 | 1.7% |
| 19 | Mills | 3,450 | 1.6% |
| 20 | Wheatland | 3,403 | -0.7% |
| 21 | Newcastle | 3,159 | -0.7% |
| 22 | Thermopolis | 2,884 | -1.8% |
| 23 | Kemmerer | 2,437 | -1.6% |
| 24 | Evansville | 2,335 | 0.7% |
| 25 | Glenrock | 2,298 | 0.4% |
| 26 | Lovell | 2,261 | -0.8% |
| 27 | Lyman | 1,894 | -0.4% |
| 28 | Afton | 1,749 | -1.1% |
| 29 | Greybull | 1,740 | -0.7% |
| 30 | Saratoga | 1,678 | -0.5% |
| 31 | Pinedale | 1,647 | 3.2% |
| 32 | Wright | 1,424 | 1.0% |
| 33 | Lusk | 1,318 | -1.7% |
| 34 | Bar Nunn | 1,286 | 6.5% |
| 35 | Basin | 1,223 | -0.3% |
| 36 | Sundance | 1,205 | -0.1% |
| 37 | Pine Bluffs | 1,165 | 0.2% |
| 38 | Mountain View | 1,147 | -0.3% |
| 39 | Guernsey | 1,101 | -0.7% |
| 40 | Dubois | 995 | 0.5% |
| 41 | Marbleton | 876 | 2.3% |
| 42 | Hanna | 843 | -0.6% |
| 43 | Moorcroft | 843 | 0.4% |
| 44 | Upton | 841 | -0.8% |
| 45 | Alpine | 753 | 6.0% |
| 46 | Dayton | 728 | 0.9% |
| 47 | Ranchester | 711 | 0.3% |
| 48 | Diamondville | 666 | -1.4% |
| 49 | Shoshoni | 660 | 0.8% |
| 50 | Star Valley Ranch | 623 | -0.9% |
| 51 | Cowley | 579 | 0.7% |
| 52 | Byron | 545 | -0.4% |
| 53 | Lingle | 485 | -1.0% |
| 54 | Bear River | 473 | -0.1% |
| 55 | Cokeville | 471 | -1.5% |
| 56 | Big Piney | 471 | 1.9% |
| 57 | Rolling Hills | 461 | 0.1% |
| 58 | Hulett | 446 | 0.5% |
| 59 | Encampment | 434 | -0.3% |
| 60 | Midwest | 425 | 0.8% |
| 61 | Hudson | 413 | 0.3% |
| 62 | La Barge | 403 | -1.3% |
| 63 | Sinclair | 397 | -1.2% |
| 64 | Thayne | 351 | – |
| 65 | Baggs | 349 | 0.1% |
| 66 | Meeteetse | 343 | -0.5% |
| 67 | La Grange | 332 | -0.2% |
| 68 | Ten Sleep | 315 | 0.2% |
| 69 | Burns | 312 | 1.8% |
| 70 | Pine Haven | 309 | 6.6% |
| 71 | Kaycee | 272 | 1.7% |
| 72 | Wamsutter | 262 | 0.2% |
| 73 | Medicine Bow | 260 | -1.0% |
| 74 | East Thermopolis | 258 | -1.1% |
| 75 | Burlington | 246 | -0.2% |
| 76 | Superior | 234 | -0.8% |
| 77 | Fort Laramie | 230 | -1.1% |
| 78 | Rock River | 228 | -0.6% |
| 79 | Chugwater | 227 | -1.3% |
| 80 | Glendo | 224 | -0.4% |
| 81 | Frannie | 208 | – |
| 82 | Elk Mountain | 188 | -0.3% |
| 83 | Deaver | 176 | – |
| 84 | Edgerton | 173 | 0.5% |
| 85 | Pavillion | 164 | -0.1% |
| 86 | Yoder | 162 | -0.8% |
| 87 | Granger | 144 | -0.3% |
| 88 | Albin | 118 | -0.3% |
| 89 | Clearmont | 115 | – |
| 90 | Manderson | 101 | -0.6% |
| 91 | Manville | 98 | -0.8% |
| 92 | Opal | 95 | -1.4% |
| 93 | Bairoil | 95 | -0.4% |
| 94 | Dixon | 79 | – |
| 95 | Hartville | 73 | -0.5% |
| 96 | Riverside | 58 | -0.3% |
| 97 | Kirby | 52 | -1.1% |
| 98 | Van Tassell | 18 | – |
| 99 | Lost Springs | 1 | – |
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