Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Messiah Lutheran Church | Church | 1709 | Carbon | 45 10 45 N | 109 15 05 W |
| Messiah Lutheran Church | Church | 773 | Hill | 48 32 02 N | 109 40 51 W |
| Messiah Lutheran Church | Church | 1033 | Missoula | 46 53 35 N | 113 57 53 W |
| Metallurgy Building | Building | 1760 | Silver Bow | 46 00 40 N | 112 33 27 W |
| Metals Technology Building | Building | 784 | Hill | 48 32 27 N | 109 41 01 W |
| Metcalf Lake | Lake | 986 | Lake | 47 45 26 N | 113 50 30 W |
| Metersville (historical) | Populated Place | 843 | Garfield | 47 29 25 N | 107 36 02 W |
| Methodist Church - Rohrer United | Church | 823 | Chouteau | 48 10 43 N | 110 06 44 W |
| Methodist Church (historical) | Church | 1821 | Meagher | 46 26 29 N | 110 40 19 W |
| Methodist Church (historical) | Church | 1313 | Powell | 46 51 60 N | 112 57 40 W |
| Methodist Church (historical) | Church | 1072 | Teton | 47 55 42 N | 111 48 37 W |
| Methodist Church United | Church | 1008 | Hill | 48 33 23 N | 110 41 21 W |
| Methodist Episcopal Church (historical) | Church | 1212 | Teton | 47 58 45 N | 112 18 42 W |
| Methodist Episcopal Church of Outlook (historical) | Church | 721 | Sheridan | 48 53 26 N | 104 46 36 W |
| Methodist Free Church of Daleview (historical) | Church | 665 | Sheridan | 48 54 50 N | 104 56 02 W |
| Methodist-Episcopal Church | Church | 1194 | Broadwater | 46 10 22 N | 111 26 28 W |
| MetraPark | Locale | 948 | Yellowstone | 45 47 50 N | 108 28 50 W |
| Metropolitan Bar | Bar | 1118 | Lewis and Clark | 46 40 01 N | 111 47 58 W |
| Metropolitan Community Church | Church | 1031 | Cascade | 47 29 15 N | 111 20 26 W |
| Mettler Coulee | Valley | | Glacier | 48 22 04 N | 113 11 59 W |
| Metzel Creek | Stream | | Beaverhead | 44 38 50 N | 111 53 31 W |
| Metzel Creek Airport | Airport | 2034 | Beaverhead | 44 41 12 N | 111 53 39 W |
| Metzel Ranch | Locale | 1650 | Madison | 45 11 51 N | 112 08 24 W |
| Metzel West Side Ditch | Canal | 1664 | Madison | 45 10 38 N | 112 09 06 W |
| Mewonitoc Mine | Mine | 2473 | Beaverhead | 45 41 55 N | 112 56 03 W |
| Mexican Buttes | Summit | 1052 | Yellowstone | 46 17 04 N | 107 40 50 W |
| Mexican Gulch | Valley | | Sweet Grass | 45 46 19 N | 109 54 37 W |
| Mexican Joe Creek | Stream | | Stillwater | 45 33 18 N | 109 22 25 W |
| Mexican John Creek | Stream | | Wheatland | 46 26 29 N | 109 58 07 W |
| Meyer Creek Work Center | Locale | 1725 | Stillwater | 45 29 25 N | 109 54 49 W |
| Meyer Hill | Summit | 1269 | Lewis and Clark | 47 30 31 N | 112 18 35 W |
| Meyer Lake | Lake | 1218 | Lewis and Clark | 47 30 05 N | 112 19 13 W |
| Meyer Mountain | Summit | 2514 | Sweet Grass | 45 28 33 N | 109 58 26 W |
| Meyer Spring | Spring | 1495 | Jefferson | 46 05 17 N | 111 49 26 W |
| Meyers Creek | Populated Place | 1852 | Stillwater | 45 29 40 N | 109 55 55 W |
| Meyers Creek | Stream | | Custer | 46 23 30 N | 105 18 60 W |
| Meyers Creek | Stream | | Granite | 46 03 07 N | 113 32 18 W |
| Meyers Creek | Stream | | Sweet Grass | 45 29 11 N | 109 54 25 W |
| Meyers Dam | Dam | 1696 | Deer Lodge | 46 09 15 N | 113 02 18 W |
| Meyers Dam | Dam | 1694 | Deer Lodge | 46 09 06 N | 113 02 15 W |
| Meyers Gulch | Valley | | Beaverhead | 45 24 24 N | 112 50 22 W |
| Meyers Gulch | Valley | | Broadwater | 46 14 27 N | 111 13 23 W |
| Meyers Gulch | Valley | | Jefferson | 46 17 07 N | 112 16 33 W |
| Meyers Gulch Mine | Mine | 1658 | Jefferson | 46 17 02 N | 112 16 30 W |
| Meyers Hill | Summit | 2173 | Lewis and Clark | 46 43 27 N | 112 27 31 W |
| Meyers School (historical) | School | 796 | Prairie | 46 43 44 N | 104 53 11 W |
| Meyers-Rapstad-Rudd Ditch | Canal | 1244 | Sweet Grass | 45 51 50 N | 109 54 08 W |
| Meyersburg (historical) | Populated Place | 1537 | Park | 46 00 40 N | 110 39 48 W |
| Meyersburg Post Office (historical) | Post Office | 1537 | Park | 46 00 40 N | 110 39 48 W |
| Meyersburg School (historical) | School | 1582 | Park | 45 59 37 N | 110 43 58 W |
| MGV Mine | Mine | 1529 | Madison | 45 41 18 N | 112 18 21 W |
| Miami Beach Ski Trail | Trail | 2528 | Carbon | 45 11 15 N | 109 21 03 W |
| Miami Colony School | School | 1175 | Pondera | 48 11 29 N | 112 16 53 W |
| Mica Claims Mine | Mine | 2179 | Madison | 45 24 30 N | 111 52 38 W |
| Mica Creek | Stream | | Gallatin | 45 26 11 N | 111 10 08 W |
| Mica Creek Mine | Mine | 1960 | Gallatin | 45 26 47 N | 111 09 25 W |
| Mica Mine | Mine | 1936 | Gallatin | 45 26 46 N | 111 09 24 W |
| Micawber | Mine | 1944 | Lewis and Clark | 46 28 14 N | 112 14 30 W |
| Micayune Gulch | Valley | | Mineral | 47 04 53 N | 114 45 36 W |
| Michael Ditch | Canal | 1406 | Sweet Grass | 45 41 37 N | 110 02 44 W |
| Michael Gulch | Valley | | Sweet Grass | 45 40 38 N | 110 05 22 W |
| Michael Spring | Spring | 1063 | Carter | 45 45 39 N | 104 40 59 W |
| Michaels Draw | Valley | | Lincoln | 48 25 20 N | 115 31 39 W |
| Micharl Creek | Stream | | Sanders | 47 26 48 N | 114 37 16 W |
| Miche Wabun Falls | Falls | 1691 | Glacier | 48 58 58 N | 113 46 16 W |
| Miche Wabun Glacier | Glacier | 2132 | Glacier | 48 56 51 N | 113 50 03 W |
| Miche Wabun Lake | Lake | 1818 | Glacier | 48 57 27 N | 113 49 12 W |
| Miche Wabun Peak | Summit | 2502 | Glacier | 48 58 16 N | 113 49 52 W |
| Michel Guesenburu Dam | Dam | 905 | Garfield | 47 05 12 N | 107 09 08 W |
| Michel Number 1 Dam | Dam | 926 | Garfield | 47 03 36 N | 107 10 44 W |
| Michel Ranch | Locale | 2024 | Gallatin | 45 14 45 N | 111 19 55 W |
| Michels Ranch Mine | Mine | 1862 | Madison | 45 30 10 N | 111 40 39 W |
| Michels School (historical) | School | 869 | Wibaux | 46 55 09 N | 104 04 18 W |
| Michener Creek | Stream | | Gallatin | 45 15 12 N | 111 15 11 W |
| Michigan Dam | Dam | 869 | Hill | 48 39 18 N | 109 49 21 W |
| Michigan School (historical) | School | 1623 | Cascade | 47 08 23 N | 110 50 11 W |
| Michigan Settlement (historical) | Populated Place | 1623 | Cascade | 47 08 22 N | 110 50 11 W |
| Micho Mine | Mine | 1679 | Flathead | 48 29 14 N | 114 18 59 W |
| Micho Trail | Trail | 1659 | Flathead | 48 29 10 N | 114 19 14 W |
| Mickey Butte | Summit | 878 | Phillips | 47 35 28 N | 107 46 21 W |
| Mickey Coulee | Valley | | Phillips | 47 38 59 N | 107 50 10 W |
| Mickus Bottom | Bay | 686 | Phillips | 47 33 35 N | 107 48 34 W |
| Mickus Coulee | Valley | | Phillips | 47 33 48 N | 107 49 05 W |
| Mid Canon | Locale | 1045 | Cascade | 47 07 56 N | 111 53 16 W |
| Mid Canon | Populated Place | 1045 | Cascade | 47 07 56 N | 111 53 16 W |
| Mid Canon Fishing Access Site | Locale | 1047 | Cascade | 47 07 53 N | 111 53 18 W |
| Mid Canon Post Office (historical) | Post Office | 1045 | Cascade | 47 07 56 N | 111 53 16 W |
| Mid Creek | Stream | | Flathead | 47 46 60 N | 113 24 24 W |
| Mid Fork Warm Springs Mine | Mine | 1651 | Jefferson | 46 24 60 N | 111 53 33 W |
| Mid Mountain | Summit | 2248 | Flathead | 47 49 41 N | 113 17 54 W |
| Midale | Populated Place | 811 | Phillips | 47 54 15 N | 108 09 43 W |
| Midale Cemetery | Cemetery | 827 | Phillips | 47 54 35 N | 108 06 25 W |
| Midale Post Office (historical) | Post Office | 811 | Phillips | 47 54 15 N | 108 09 43 W |
| Midale School (historical) | School | 824 | Phillips | 47 54 53 N | 108 10 25 W |
| Midas Creek | Stream | | Lincoln | 48 09 07 N | 115 31 23 W |
| Midas Mine | Mine | 1294 | Lincoln | 48 04 56 N | 115 30 38 W |
| Midas Point | Summit | 1391 | Lincoln | 48 05 35 N | 115 31 48 W |
| Midasburg (historical) | Locale | 1541 | Madison | 45 33 57 N | 111 45 33 W |
| Midby (historical) | Locale | 624 | Sheridan | 48 46 04 N | 104 41 10 W |
| Midby (historical) | Populated Place | 624 | Sheridan | 48 46 04 N | 104 41 10 W |
| Midby Post Office (historical) | Post Office | 624 | Sheridan | 48 46 04 N | 104 41 10 W |
| Middle Axolotl Lake Number 1 Dam | Dam | 2210 | Madison | 45 13 60 N | 111 52 33 W |
| Middle Axolotl Lake Number 2 Dam | Dam | 2210 | Madison | 45 13 60 N | 111 52 33 W |
| Middle Basin | Basin | 2026 | Gallatin | 45 03 42 N | 111 10 19 W |
| Middle Bench | Bench | 1696 | Fergus | 46 49 32 N | 109 08 49 W |
| Middle Bench Pine Grove School (historical) | School | 1678 | Fergus | 46 50 41 N | 109 06 33 W |
| Middle Bowman Lake | Reservoir | 2443 | Powell | 46 18 60 N | 113 01 39 W |
| Middle Butte | Summit | 1049 | Blaine | 48 47 34 N | 108 52 31 W |
| Middle Butte | Summit | 1670 | Toole | 48 51 55 N | 111 21 60 W |
| Middle Butte School (historical) | School | 875 | Blaine | 48 43 41 N | 108 56 03 W |