Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Cottonwood Gulch | Valley | | Missoula | 47 03 41 N | 114 10 33 W |
| Cottonwood Hollow | Valley | | Meagher | 46 42 07 N | 111 22 03 W |
| Cottonwood Lake | Lake | 2222 | Jefferson | 46 19 41 N | 112 28 50 W |
| Cottonwood Lake | Lake | 2692 | Park | 46 02 17 N | 110 20 31 W |
| Cottonwood Lakes | Lake | 1475 | Missoula | 47 10 01 N | 113 21 07 W |
| Cottonwood Meadow | Flat | 2032 | Powell | 46 43 29 N | 112 50 51 W |
| Cottonwood Mountain | Summit | 2116 | Deer Lodge | 46 13 19 N | 112 38 28 W |
| Cottonwood Natural Area | Reserve | 2127 | Madison | 44 57 60 N | 111 57 03 W |
| Cottonwood Park | Park | 1314 | Powell | 47 06 34 N | 113 16 17 W |
| Cottonwood Park | Park | 985 | Rosebud | 45 52 40 N | 106 37 39 W |
| Cottonwood Post Office (historical) | Post Office | 1289 | Fergus | 47 00 21 N | 109 30 49 W |
| Cottonwood Post Office (historical) | Post Office | 852 | Hill | 48 46 33 N | 109 59 08 W |
| Cottonwood Ranch (historical) | Locale | 1444 | Madison | 45 28 30 N | 112 17 48 W |
| Cottonwood Reservoir | Reservoir | 721 | Garfield | 47 27 09 N | 106 24 10 W |
| Cottonwood Reservoir | Reservoir | 1556 | Park | 46 02 06 N | 110 40 57 W |
| Cottonwood Reservoir | Reservoir | 1045 | Powder River | 45 41 15 N | 106 09 37 W |
| Cottonwood Reservoir | Reservoir | 698 | Valley | 47 54 13 N | 106 55 13 W |
| Cottonwood School | School | 943 | Custer | 46 24 54 N | 104 58 05 W |
| Cottonwood School | School | 1408 | Fergus | 46 56 38 N | 109 27 21 W |
| Cottonwood School | School | 1642 | Gallatin | 45 34 11 N | 111 07 33 W |
| Cottonwood School | School | 863 | Hill | 48 46 47 N | 109 59 18 W |
| Cottonwood School (historical) | School | 1558 | Broadwater | 46 22 01 N | 111 17 05 W |
| Cottonwood School (historical) | School | 1230 | Cascade | 47 19 10 N | 111 08 43 W |
| Cottonwood School (historical) | School | 1783 | Park | 45 57 01 N | 110 29 20 W |
| Cottonwood School (historical) | School | 847 | Phillips | 48 42 18 N | 107 52 21 W |
| Cottonwood School (historical) | School | 783 | Prairie | 46 56 07 N | 105 15 36 W |
| Cottonwood School (historical) | School | 830 | Rosebud | 46 32 30 N | 106 38 22 W |
| Cottonwood School (historical) | School | 1297 | Stillwater | 45 46 53 N | 109 23 58 W |
| Cottonwood School (historical) | School | 827 | Valley | 48 31 52 N | 105 55 25 W |
| Cottonwood Spring | Spring | 1071 | Fergus | 47 28 16 N | 109 26 50 W |
| Cottonwood Spring | Spring | 1690 | Madison | 45 33 60 N | 112 39 34 W |
| Cottonwood Spring | Spring | 1154 | Rosebud | 45 19 09 N | 106 25 09 W |
| Cottonwood Springs | Spring | 1507 | Sweet Grass | 46 06 19 N | 109 49 04 W |
| Cottonwood Tree Lakes | Reservoir | 955 | Garfield | 46 53 17 N | 106 54 32 W |
| Cottonwood Well | Well | 1011 | Powder River | 45 41 59 N | 106 10 17 W |
| COTTONWOOD_MN_NO Spring | Spring | 1189 | Cascade | 47 20 16 N | 111 08 60 W |
| Couch Coulee Number 1 Dam | Dam | 928 | Hill | 48 49 24 N | 109 53 57 W |
| Couch Coulee Number 2 Dam | Dam | 926 | Hill | 48 50 36 N | 109 53 33 W |
| Couch Coulee Number 3 Dam | Dam | 886 | Hill | 48 47 42 N | 109 51 39 W |
| Cougar Creek | Stream | 1994 | Gallatin | 44 46 23 N | 111 07 32 W |
| Cougar Creek | Stream | | Granite | 46 03 17 N | 113 45 50 W |
| Cougar Creek | Stream | | Granite | 46 01 38 N | 113 31 25 W |
| Cougar Creek | Stream | | Granite | 46 27 18 N | 113 46 05 W |
| Cougar Creek | Stream | | Madison | 45 09 06 N | 111 25 28 W |
| Cougar Creek | Stream | | Mineral | 47 07 44 N | 114 48 03 W |
| Cougar Gulch | Valley | | Sanders | 47 43 23 N | 115 25 01 W |
| Cougar Lake | Lake | 913 | Flathead | 48 09 15 N | 114 03 43 W |
| Cougar Peak | Summit | 2020 | Sanders | 47 44 40 N | 115 23 04 W |
| Cougar Ski Trail | Trail | 1816 | Lewis and Clark | 46 45 12 N | 112 18 50 W |
| Coughlin | Populated Place | 1313 | Powell | 46 56 01 N | 112 57 13 W |
| Coulee Creek | Stream | | Stillwater | 45 41 55 N | 109 23 41 W |
| Coulee Creek (historical) | Locale | 1420 | Carbon | 45 21 30 N | 109 09 28 W |
| Coulee Reservoir | Reservoir | 691 | Valley | 48 01 35 N | 106 58 14 W |
| Coulson Ditch | Canal | 943 | Yellowstone | 45 49 07 N | 108 25 12 W |
| Coulston (historical) | Locale | 1849 | Gallatin | 45 38 20 N | 110 47 48 W |
| Coulston Mine | Mine | 1849 | Gallatin | 45 38 20 N | 110 47 48 W |
| Coulter Campground | Locale | 1104 | Lewis and Clark | 46 51 33 N | 111 54 26 W |
| Coulter Canyon | Valley | | Lewis and Clark | 46 51 34 N | 111 54 27 W |
| Coulter Coulee | Valley | | Valley | 48 45 14 N | 107 12 20 W |
| Coulter Number 1 Dam | Dam | 879 | Garfield | 47 35 48 N | 107 17 26 W |
| Coulter Number 2 Dam | Dam | 878 | Garfield | 47 34 24 N | 107 18 08 W |
| Council Grove | Locale | 940 | Missoula | 46 54 34 N | 114 09 12 W |
| Council Grove State Park | Park | 940 | Missoula | 46 54 45 N | 114 09 03 W |
| Council Hill | Summit | 1003 | Missoula | 46 52 17 N | 114 06 10 W |
| Council Island | Island | 734 | Chouteau | 47 44 05 N | 109 36 45 W |
| Count Peak | Summit | 2639 | Powell | 47 20 08 N | 113 23 45 W |
| Country Bible Church | Church | 1240 | Lewis and Clark | 47 29 34 N | 112 23 32 W |
| Country Club Ski Trail | Trail | 2365 | Madison | 45 16 51 N | 111 24 24 W |
| Country Court | Populated Place | 1503 | Gallatin | 45 36 20 N | 111 11 33 W |
| Country Estates Mobile Home Park | Populated Place | 954 | Flathead | 48 23 10 N | 114 11 33 W |
| Country Fellowship Baptist Church | Church | 800 | Lincoln | 48 52 51 N | 115 03 17 W |
| Country Way Church of God | Church | 913 | Flathead | 48 14 25 N | 114 19 10 W |
| Countryman Creek | Stream | | Stillwater | 45 38 58 N | 109 20 31 W |
| Countryman Creek School (historical) | School | 1186 | Stillwater | 45 38 33 N | 109 23 51 W |
| Countrymans Bluff | Cliff | 1119 | Stillwater | 45 37 13 N | 109 11 51 W |
| Countryside Court Mobile Home Park | Populated Place | 960 | Missoula | 46 53 18 N | 114 04 14 W |
| Countryside Village | Populated Place | 1072 | Cascade | 47 32 22 N | 111 17 48 W |
| Counts Creek | Stream | | Park | 45 19 22 N | 110 34 25 W |
| Courchene Cemetery | Cemetery | 607 | Roosevelt | 48 05 58 N | 105 35 36 W |
| Court Park | Park | 982 | Rosebud | 45 52 54 N | 106 37 28 W |
| Court Sheriff Recreation Area | Locale | 1165 | Lewis and Clark | 46 39 26 N | 111 42 33 W |
| Courthouse Lake | Lake | 2839 | Park | 45 07 36 N | 109 59 18 W |
| Courthouse Mountain | Summit | 3199 | Park | 45 08 10 N | 109 56 40 W |
| Courtney Herefords Number 3 Dam | Dam | 1046 | Carter | 45 07 60 N | 104 10 38 W |
| Courtney School (historical) | School | 751 | Sheridan | 48 39 52 N | 104 45 16 W |
| Courtneys Creek | Stream | | Judith Basin | 46 58 15 N | 110 04 46 W |
| Courts Cemetery | Cemetery | 1370 | Gallatin | 45 51 30 N | 111 08 53 W |
| Courts Post Office (historical) | Post Office | 1403 | Gallatin | 45 52 15 N | 111 05 03 W |
| Courville Creek | Stream | | Lake | 47 37 02 N | 114 02 05 W |
| Courville Lake | Lake | 1916 | Lake | 47 35 60 N | 113 59 35 W |
| Cousin Jeny/Lomonica Mine | Mine | 1781 | Madison | 45 30 40 N | 111 50 03 W |
| Cove Creek | Stream | | Flathead | 48 16 58 N | 114 02 26 W |
| Cove Creek | Stream | | Yellowstone | 45 48 09 N | 108 39 60 W |
| Cove Ditch | Canal | 1038 | Yellowstone | 45 45 53 N | 108 43 10 W |
| Covenant United Methodist Church | Church | 1262 | Lewis and Clark | 46 35 02 N | 112 00 01 W |
| Covered Wagon Mobile Home Park | Populated Place | 1453 | Gallatin | 45 41 30 N | 111 03 23 W |
| Covered Wagon Ranch | Locale | 2012 | Gallatin | 45 04 32 N | 111 12 19 W |
| Cow Cabin Creek | Stream | | Beaverhead | 45 29 00 N | 113 27 29 W |
| Cow Cabin Creek | Stream | | Beaverhead | 45 18 44 N | 113 19 34 W |
| Cow Camp | Locale | 1879 | Beaverhead | 45 26 55 N | 112 50 22 W |
| Cow Camp | Locale | 1338 | Big Horn | 45 06 39 N | 108 07 35 W |
| Cow Camp | Locale | 1717 | Madison | 45 31 19 N | 111 26 44 W |
| Cow Camp | Locale | 2069 | Silver Bow | 45 43 57 N | 112 31 56 W |
| Cow Camp Meadows | Flat | 1911 | Granite | 46 06 28 N | 113 41 20 W |
| Cow Camp Spring | Spring | 899 | Fergus | 47 39 37 N | 109 45 04 W |
| Cow Camp Spring | Spring | 2054 | Madison | 44 54 30 N | 111 59 37 W |
| Cow Coulee | Valley | | Meagher | 46 58 39 N | 111 17 10 W |
| Cow Coulee | Valley | | Valley | 48 44 22 N | 106 52 58 W |
| Cow Coulee Boat Camp | Locale | 1210 | Meagher | 46 59 23 N | 111 17 34 W |
| Cow Country Historical Marker | Park | 983 | Musselshell | 46 26 06 N | 108 34 07 W |