| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Madden | city | Wyoming | United States | 43.21 | -107.52 | 5869 | |
| Mammoth | city | Wyoming | United States | 44.98 | -110.70 | 6236 | |
| Manderson | city | Wyoming | United States | 44.27 | -107.96 | 4189 | |
| Manville | city | Wyoming | United States | 42.78 | -104.62 | 5341 | |
| Marbleton | city | Wyoming | United States | 42.55 | -110.11 | 6801 | |
| Marvin Place (historical) | city | Wyoming | United States | 42.22 | -107.19 | 7549 | |
| Mayoworth | city | Wyoming | United States | 43.83 | -106.79 | 5180 | |
| McCargar Place | city | Wyoming | United States | 42.20 | -107.13 | 6801 | |
| McFadden | city | Wyoming | United States | 41.65 | -106.13 | 7549 | |
| McKinnon | city | Wyoming | United States | 41.03 | -109.94 | 7549 | |
| Meadow Acres | city | Wyoming | United States | 42.86 | -106.09 | 5164 | |
| Meadow Lark Lake | city | Wyoming | United States | 44.18 | -107.25 | 8389 | |
| Meadowdale | city | Wyoming | United States | 42.55 | -104.70 | 5377 | |
| Medicine Bow | city | Wyoming | United States | 41.90 | -106.20 | 6709 | |
| Meeteetse | city | Wyoming | United States | 44.16 | -108.87 | 5869 | |
| Meriden | city | Wyoming | United States | 41.54 | -104.32 | 5029 | |
| Merna | city | Wyoming | United States | 42.95 | -110.34 | 7706 | |
| Mers Hill | city | Wyoming | United States | 41.88 | -104.62 | 5029 | |
| Midvale | city | Wyoming | United States | 43.21 | -108.45 | 5121 | |
| Midwest | city | Wyoming | United States | 43.41 | -106.28 | 5029 | |
| Midwest Heights | city | Wyoming | United States | 42.85 | -106.36 | 5144 | |
| Milford | city | Wyoming | United States | 42.88 | -108.78 | 5869 | |
| Millbrook | city | Wyoming | United States | 41.32 | -105.92 | 7549 | |
| Millburne | city | Wyoming | United States | 41.26 | -110.41 | 6998 | |
| Mills | city | Wyoming | United States | 42.84 | -106.37 | 5141 | |
| Milo | city | Wyoming | United States | 41.62 | -106.42 | 7598 | |
| Miners Delight | city | Wyoming | United States | 42.53 | -108.68 | 8389 | |
| Minnesela | city | Wyoming | United States | 43.59 | -108.22 | 4491 | |
| Mona | city | Wyoming | United States | 44.81 | -104.38 | 4189 | |
| Monarch | city | Wyoming | United States | 44.90 | -107.04 | 3730 | |
| Monell | city | Wyoming | United States | 41.59 | -108.48 | 6837 | |
| Moneta | city | Wyoming | United States | 43.16 | -107.72 | 5449 | |
| Moorcroft | city | Wyoming | United States | 44.26 | -104.95 | 4294 | |
| Moose | city | Wyoming | United States | 43.66 | -110.72 | 6709 | |
| Moose Wilson Road | city | Wyoming | United States | 43.53 | -110.84 | 6187 | |
| Moran | city | Wyoming | United States | 43.84 | -110.51 | 6725 | |
| Morrisey | city | Wyoming | United States | 43.52 | -104.38 | 4189 | |
| Morrisey (historical) | city | Wyoming | United States | 41.49 | -106.14 | 8756 | |
| Morton | city | Wyoming | United States | 43.20 | -108.77 | 5429 | |
| Moskee | city | Wyoming | United States | 44.27 | -104.18 | 5433 | |
| Mountain Home | city | Wyoming | United States | 41.01 | -106.17 | 8795 | |
| Mountain View | city | Wyoming | United States | 42.85 | -106.39 | 5203 | |
| Mountain View | city | Wyoming | United States | 41.27 | -110.34 | 6945 | |
| Muddy Gap | city | Wyoming | United States | 42.35 | -107.46 | 6709 | |
| Murke | city | Wyoming | United States | 41.42 | -105.22 | 6709 | |
| Myersville (historical) | city | Wyoming | United States | 42.56 | -108.11 | 6709 | |
| Mâhtóhtôhééêše Tséôhkêhenove | city | Wyoming | United States | 44.03 | -107.45 | 4445 |