Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Murphy Spring | Spring | 1073 | Carter | 45 49 43 N | 104 25 13 W |
| Murphys Trailer Court | Populated Place | 1241 | Gallatin | 45 53 30 N | 111 33 06 W |
| Murr Creek | Stream | | Flathead | 47 56 26 N | 114 58 33 W |
| Murr Peak | Summit | 2061 | Flathead | 47 57 19 N | 114 51 15 W |
| Murr Peak Trail | Trail | 1626 | Flathead | 47 58 44 N | 114 52 19 W |
| Murray Bay Campground | Locale | 1098 | Flathead | 48 16 01 N | 113 48 48 W |
| Murray Cabin | Locale | 2306 | Jefferson | 46 05 54 N | 112 03 05 W |
| Murray Canyon Trail | Trail | 1496 | Flathead | 48 13 05 N | 113 44 11 W |
| Murray Coulee | Valley | | Blaine | 48 55 50 N | 108 35 33 W |
| Murray Coulee | Valley | | Garfield | 47 28 23 N | 106 19 51 W |
| Murray Creek | Stream | | Flathead | 48 15 55 N | 113 48 29 W |
| Murray Creek | Stream | | Powell | 46 48 30 N | 113 03 27 W |
| Murray Creek (historical) | Stream | | Lincoln | 48 56 35 N | 115 09 59 W |
| Murray Dam | Dam | 923 | Fergus | 47 30 12 N | 108 52 51 W |
| Murray Ditch | Canal | 1255 | Judith Basin | 47 00 42 N | 109 54 36 W |
| Murray Gilbert Slough | Stream | | Beaverhead | 45 17 46 N | 112 35 27 W |
| Murray Hill | Summit | 885 | Valley | 47 48 37 N | 107 02 39 W |
| Murray Island (historical) | Island | 751 | Lincoln | 48 54 11 N | 115 11 35 W |
| Murray Lake | Lake | 1030 | Flathead | 48 26 31 N | 114 27 09 W |
| Murray Memorial Cemetery | Cemetery | 872 | Sanders | 47 42 14 N | 114 38 04 W |
| Murray Number 1 Dam | Dam | 882 | Custer | 46 21 48 N | 105 41 20 W |
| Murray Place | Populated Place | 788 | Valley | 47 48 24 N | 107 03 57 W |
| Murray Post Office (historical) | Post Office | 991 | Flathead | 48 06 47 N | 114 27 58 W |
| Murray Ranch | Locale | 1251 | Sweet Grass | 45 53 29 N | 109 54 40 W |
| Murray School (historical) | School | 766 | Phillips | 48 17 30 N | 108 06 25 W |
| Murray School (historical) | School | 680 | Roosevelt | 48 27 17 N | 104 42 14 W |
| Murray Springs State Fish Hatchery | Locale | 774 | Lincoln | 48 57 20 N | 115 08 49 W |
| Murray Trailer Park | Populated Place | 689 | Phillips | 48 20 60 N | 107 52 17 W |
| Murry Ranch | Locale | 1357 | Park | 45 42 02 N | 110 27 33 W |
| Muscleshell City (historical) | Populated Place | 685 | Petroleum | 47 27 20 N | 107 54 52 W |
| Museum and Depot Park | Park | 1555 | Beaverhead | 45 13 03 N | 112 38 18 W |
| Museum of the Beartooths | Building | 1098 | Stillwater | 45 38 30 N | 109 15 06 W |
| Museum of the Northern Great Plains | Building | 804 | Chouteau | 47 49 30 N | 110 39 59 W |
| Museum of the Plains Indian | Building | 1337 | Glacier | 48 33 25 N | 113 01 22 W |
| Museum of the Rockies | Building | 1499 | Gallatin | 45 39 53 N | 111 02 59 W |
| Museum of the Upper Missouri | Building | 799 | Chouteau | 47 49 15 N | 110 39 48 W |
| Museum of the Yellowstone | Building | 2033 | Gallatin | 44 39 33 N | 111 06 03 W |
| Musgrave Post Office (historical) | Post Office | 1230 | Carbon | 45 09 50 N | 108 49 42 W |
| Mushroom Creek | Stream | | Powder River | 45 40 21 N | 105 14 10 W |
| Mushroom Mountain | Summit | 1711 | Lincoln | 48 57 05 N | 115 51 42 W |
| Music Building | Building | 980 | Missoula | 46 51 45 N | 113 59 10 W |
| Muskrat Creek | Stream | | Carter | 45 26 29 N | 104 31 38 W |
| Muskrat Creek | Stream | | Fergus | 47 11 50 N | 109 18 55 W |
| Muskrat Creek | Stream | | Jefferson | 46 11 51 N | 112 05 09 W |
| Muskrat Creek | Stream | | Pondera | 48 10 42 N | 113 07 47 W |
| Muskrat Creek | Stream | | Richland | 47 53 40 N | 105 08 34 W |
| Muskrat Creek Trail | Trail | 1817 | Flathead | 48 08 28 N | 113 04 17 W |
| Muskrat Pass | Gap | 1824 | Flathead | 48 08 40 N | 113 04 32 W |
| Musselman Coulee | Valley | | Fergus | 47 33 32 N | 108 39 39 W |
| Musselshell | Populated Place | 913 | Musselshell | 46 31 07 N | 108 05 28 W |
| Musselshell (historical) | Locale | 912 | Musselshell | 46 31 44 N | 108 05 27 W |
| Musselshell Cemetery | Cemetery | 934 | Musselshell | 46 29 56 N | 108 05 22 W |
| Musselshell County | Civil | 1030 | Musselshell | 46 31 00 N | 108 23 02 W |
| Musselshell County Courthouse | Building | 981 | Musselshell | 46 26 47 N | 108 32 29 W |
| Musselshell County Fairground | Locale | 973 | Musselshell | 46 26 19 N | 108 31 52 W |
| Musselshell County Sheriffs Office | Building | 987 | Musselshell | 46 26 59 N | 108 32 28 W |
| Musselshell Ditch County Canal | Canal | 902 | Musselshell | 46 34 15 N | 108 00 17 W |
| Musselshell Elementary School | School | 916 | Musselshell | 46 30 59 N | 108 05 28 W |
| Musselshell Fire Department | Building | 913 | Musselshell | 46 31 07 N | 108 05 28 W |
| Musselshell Post Office | Post Office | 914 | Musselshell | 46 31 04 N | 108 05 29 W |
| Musselshell River | Stream | | Garfield | 47 22 29 N | 107 56 35 W |
| Musselshell River Bridge | Bridge | 1098 | Golden Valley | 46 18 05 N | 109 12 28 W |
| Mussigbrod Campground | Locale | 1983 | Beaverhead | 45 47 23 N | 113 36 33 W |
| Mussigbrod Creek | Stream | | Beaverhead | 45 41 50 N | 113 33 07 W |
| Mussigbrod Homestead | Locale | 1830 | Beaverhead | 45 42 57 N | 113 28 50 W |
| Mussigbrod Lake | Lake | 1980 | Beaverhead | 45 47 43 N | 113 37 00 W |
| Mussigbrod Lake | Reservoir | 1991 | Beaverhead | 45 47 30 N | 113 36 39 W |
| Mussigbrod Lake Dam | Dam | 1991 | Beaverhead | 45 47 30 N | 113 36 39 W |
| Mustang I Mine | Mine | 1123 | Lincoln | 48 23 03 N | 115 00 04 W |
| Mustapha Dam | Dam | 881 | Hill | 48 42 60 N | 110 23 27 W |
| Mustard Pass | Gap | 2949 | Madison | 45 33 21 N | 112 03 54 W |
| Muster Creek | Stream | | Custer | 46 33 08 N | 105 39 38 W |
| Mutt Lake | Lake | 2802 | Park | 45 05 30 N | 109 56 13 W |
| Mutton Coulee | Valley | | Fergus | 47 38 51 N | 109 39 10 W |
| Mutual Ditch | Canal | 1157 | Carbon | 45 12 37 N | 108 56 13 W |
| My Creek | Stream | | Teton | 48 03 21 N | 112 54 49 W |
| My Lake | Lake | 2243 | Lewis and Clark | 47 44 29 N | 113 08 25 W |
| Myer Ranch | Locale | 1161 | Broadwater | 46 25 45 N | 111 29 11 W |
| Myers | Populated Place | 817 | Treasure | 46 15 03 N | 107 20 25 W |
| Myers Bridge | Bridge | 807 | Treasure | 46 15 16 N | 107 20 44 W |
| Myers Bridge Fishing Access Site | Locale | 808 | Treasure | 46 15 17 N | 107 20 28 W |
| Myers Coulee | Valley | | Garfield | 46 56 31 N | 106 30 13 W |
| Myers Ditch | Canal | 1613 | Park | 46 04 23 N | 110 38 09 W |
| Myers Post Office (historical) | Post Office | 817 | Treasure | 46 15 03 N | 107 20 25 W |
| Myers Ranch | Locale | 1339 | Park | 45 43 25 N | 110 27 51 W |
| Myers School (historical) | School | 992 | Valley | 48 51 37 N | 106 25 32 W |
| Myers Siding | Locale | 816 | Treasure | 46 15 15 N | 107 19 28 W |
| Myles Creek | Stream | | Lewis and Clark | 47 19 49 N | 112 07 32 W |
| Myron Lake | Lake | 1224 | Lincoln | 48 05 56 N | 115 11 53 W |
| Myron Number 2 Dam | Dam | 665 | Dawson | 47 00 24 N | 104 44 08 W |
| Myrtle Butte | Summit | 1587 | Blaine | 48 14 06 N | 109 03 49 W |
| Myrtle Creek | Stream | | Blaine | 48 13 35 N | 108 59 15 W |
| Myrtle Creek | Stream | | Powder River | 45 06 49 N | 105 18 53 W |
| Myrtle Navy Mine | Mine | 1752 | Judith Basin | 47 04 26 N | 110 38 15 W |
| Mysse Ranch | Locale | 848 | Rosebud | 46 40 57 N | 107 12 07 W |
| Mystery Lake | Lake | 1604 | Flathead | 48 37 57 N | 114 36 05 W |
| Mystery Spring | Spring | 1105 | Powder River | 45 20 04 N | 106 03 36 W |
| Mystic Lake | Lake | 2414 | Beaverhead | 45 52 04 N | 113 33 02 W |
| Mystic Lake | Lake | 1950 | Gallatin | 45 32 50 N | 110 55 11 W |
| Mystic Lake | Reservoir | 1974 | Gallatin | 45 32 24 N | 110 55 09 W |
| Mystic Lake | Reservoir | 2340 | Stillwater | 45 13 32 N | 109 45 38 W |
| Mystic Lake Dam | Dam | 1974 | Gallatin | 45 32 24 N | 110 55 09 W |
| Mystic Lake Dam | Dam | 2340 | Stillwater | 45 13 30 N | 109 45 39 W |
| Mystic Lake Ditch | Canal | 1607 | Gallatin | 45 35 55 N | 111 02 53 W |
| Mystic Lake Forest Service Facility | Locale | 2417 | Beaverhead | 45 52 06 N | 113 33 05 W |
| Mystic Lake Hydroelectric Plant | Locale | 1997 | Stillwater | 45 14 38 N | 109 43 53 W |
| Mystic Lake Ranger Station | Locale | 1959 | Gallatin | 45 32 29 N | 110 55 08 W |
| Mystic Mountain | Summit | 3686 | Park | 45 10 04 N | 109 50 26 W |
| N Bar Ranch | Locale | 1329 | Fergus | 46 50 26 N | 108 55 16 W |
| N Bar Ranch Airport | Airport | 1305 | Fergus | 46 49 59 N | 108 55 05 W |