Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Cummings Post Office (historical) | Post Office | 1791 | Carbon | 45 12 28 N | 108 30 04 W |
| Cuniff Basin | Basin | 1590 | Lewis and Clark | 47 15 19 N | 112 25 24 W |
| Cuniff Creek | Stream | | Lewis and Clark | 47 14 43 N | 112 17 35 W |
| Cuniff Ditch | Canal | 1500 | Lewis and Clark | 47 16 09 N | 112 24 24 W |
| Cunningham Coulee | Valley | | Musselshell | 46 33 05 N | 107 55 26 W |
| Cunningham Park | Park | 1255 | Lewis and Clark | 46 35 54 N | 112 03 19 W |
| Cup Creek | Stream | | McCone | 47 27 03 N | 105 30 57 W |
| Cup Lake | Lake | 1934 | Flathead | 48 08 09 N | 113 37 42 W |
| Cupids Heart | Pillar | 2685 | Gallatin | 45 24 38 N | 110 56 57 W |
| Cupton Oil Field | Oilfield | 921 | Fallon | 46 32 58 N | 104 18 32 W |
| Curdys Cove | Populated Place | 1110 | Ravalli | 46 12 06 N | 114 08 55 W |
| Curl Lake | Lake | 2556 | Park | 45 03 10 N | 109 50 33 W |
| Curlew (historical) | Locale | 1159 | Ravalli | 46 27 15 N | 114 10 48 W |
| Curlew Creek | Stream | | Madison | 44 51 55 N | 111 33 15 W |
| Curlew Mine | Mine | 1180 | Ravalli | 46 27 15 N | 114 11 03 W |
| Curlew Mines | Mine | 1182 | Ravalli | 46 27 19 N | 114 11 06 W |
| Curlew School (historical) | School | 1050 | Ravalli | 46 28 20 N | 114 08 42 W |
| Curley Bill Creek | Stream | | Madison | 44 59 23 N | 111 39 33 W |
| Curley Creek | Stream | | Lincoln | 48 38 53 N | 116 04 14 W |
| Curley Spring | Spring | 1175 | Carter | 45 36 16 N | 104 10 56 W |
| Curly Bear Mountain | Summit | 2467 | Glacier | 48 39 32 N | 113 27 21 W |
| Curly Bear Mountain | Summit | 2409 | Pondera | 48 11 49 N | 113 04 50 W |
| Curly Creek | Stream | | Madison | 45 38 18 N | 112 01 53 W |
| Curly Gulch | Valley | | Silver Bow | 45 51 04 N | 112 38 58 W |
| Curly Head Canyon | Valley | | Blaine | 48 01 09 N | 108 39 12 W |
| Curly Lake | Lake | 2617 | Madison | 45 37 36 N | 112 04 57 W |
| Curly Q Dam | Dam | 815 | Phillips | 47 51 54 N | 107 58 38 W |
| Curran Gulch | Valley | | Mineral | 47 09 12 N | 114 55 03 W |
| Curran-Barrett Number 1 Dam | Dam | 1214 | Lewis and Clark | 47 09 30 N | 112 04 51 W |
| Curran-Barrett Number 2 Dam | Dam | 1155 | Lewis and Clark | 47 03 18 N | 112 04 45 W |
| Currant Creek | Stream | | Madison | 45 25 47 N | 112 04 31 W |
| Currant Creek | Stream | | Madison | 45 36 16 N | 112 18 27 W |
| Currant Creek | Stream | | Musselshell | 46 21 59 N | 108 38 31 W |
| Currant Creek Trail | Trail | 2252 | Madison | 45 28 37 N | 112 02 16 W |
| Current Dam | Dam | 837 | Phillips | 47 46 06 N | 108 14 38 W |
| Currie Coulee | Valley | | Cascade | 47 05 48 N | 110 47 39 W |
| Currie Spring | Spring | 1649 | Cascade | 47 07 03 N | 110 47 15 W |
| Currier Ranch | Locale | 1334 | Sweet Grass | 45 43 33 N | 110 13 01 W |
| Curry | Populated Place | 643 | Dawson | 47 05 25 N | 104 37 37 W |
| Curry Coulee | Valley | | Garfield | 47 25 58 N | 107 44 16 W |
| Curry Creek | Stream | | Beaverhead | 44 38 21 N | 111 55 13 W |
| Curtain Gulch | Valley | | Jefferson | 46 21 03 N | 112 08 54 W |
| Curtis Gulch | Valley | | Sweet Grass | 45 41 17 N | 109 37 59 W |
| Cushing Ditch | Canal | 1473 | Stillwater | 45 24 24 N | 109 32 11 W |
| Cushman | Locale | 1080 | Golden Valley | 46 17 21 N | 109 02 34 W |
| Cushman | Populated Place | 1083 | Golden Valley | 46 17 18 N | 109 02 34 W |
| Cushman Post Office (historical) | Post Office | 1083 | Golden Valley | 46 17 18 N | 109 02 34 W |
| Cusker School (historical) | School | 617 | McCone | 48 00 47 N | 105 42 50 W |
| Cusker School (historical) | School | 681 | Roosevelt | 48 29 00 N | 105 16 07 W |
| Cuskers House | Locale | 673 | Sheridan | 48 29 23 N | 105 17 15 W |
| Cuskerton Post Office (historical) | Post Office | 682 | Roosevelt | 48 28 31 N | 105 20 02 W |
| Custer | Populated Place | 836 | Yellowstone | 46 07 45 N | 107 33 18 W |
| Custer Coulee | Stream | | Yellowstone | 45 58 21 N | 108 14 27 W |
| Custer Coulee | Valley | | Yellowstone | 45 55 05 N | 108 13 38 W |
| Custer County | Civil | 883 | Custer | 46 17 00 N | 105 35 02 W |
| Custer County Cemetery | Cemetery | 738 | Custer | 46 23 21 N | 105 49 37 W |
| Custer County Courthouse | Building | 720 | Custer | 46 24 27 N | 105 50 41 W |
| Custer County High School | School | 722 | Custer | 46 24 26 N | 105 50 22 W |
| Custer County Sheriffs Office | Building | 720 | Custer | 46 24 27 N | 105 50 41 W |
| Custer Creek | Stream | | Big Horn | 45 35 53 N | 107 27 26 W |
| Custer Creek | Stream | | Golden Valley | 46 13 07 N | 109 11 08 W |
| Custer Creek | Stream | | Prairie | 46 42 20 N | 105 28 42 W |
| Custer Creek Dam | Dam | 704 | Prairie | 46 41 36 N | 105 31 50 W |
| Custer National Cemetery | Cemetery | 990 | Big Horn | 45 34 12 N | 107 25 55 W |
| Custer National Forest | Forest | 1104 | Powder River | 45 30 01 N | 106 00 03 W |
| Custer National Forest - Ashland Division | Forest | 1033 | Powder River | 45 29 28 N | 106 03 37 W |
| Custer National Forest - Beartooth Division | Forest | 2381 | Carbon | 45 05 35 N | 109 20 23 W |
| Custer National Forest - Sioux Division | Forest | 1028 | Carter | 45 38 50 N | 104 03 30 W |
| Custer National Forest Trail | Trail | 2929 | Carbon | 45 02 24 N | 109 19 59 W |
| Custer/Hiawatha Mine | Mine | 2099 | Jefferson | 46 18 20 N | 112 13 28 W |
| Custers Lookout | Summit | 719 | Dawson | 47 10 10 N | 104 43 22 W |
| Custom Built Feeds Elevator | Locale | 597 | Roosevelt | 48 08 34 N | 104 13 16 W |
| Cut Bank | Cliff | 1037 | Glacier | 48 29 40 N | 112 14 01 W |
| Cut Bank | Locale | 1142 | Glacier | 48 38 29 N | 112 19 54 W |
| Cut Bank | Populated Place | 1150 | Glacier | 48 37 59 N | 112 19 34 W |
| Cut Bank Air Force Station (historical) | Military (Historical) | | Glacier | 48 56 31 N | 112 48 19 W |
| Cut Bank Assembly of God Church | Church | 1154 | Glacier | 48 37 60 N | 112 19 53 W |
| Cut Bank Campground | Locale | 1568 | Glacier | 48 36 07 N | 113 22 58 W |
| Cut Bank Church of Christ | Church | 1144 | Glacier | 48 38 08 N | 112 20 14 W |
| Cut Bank Community Bible Church | Church | 1146 | Glacier | 48 38 18 N | 112 19 43 W |
| Cut Bank Coulee | Valley | | Chouteau | 47 56 22 N | 110 04 03 W |
| Cut Bank Coulee | Valley | | Chouteau | 47 40 53 N | 110 00 23 W |
| Cut Bank Creek | Stream | | Glacier | 48 29 12 N | 112 13 36 W |
| Cut Bank Fire Department | Building | 1148 | Glacier | 48 38 07 N | 112 19 49 W |
| Cut Bank Golf and Country Club | Locale | 1115 | Glacier | 48 37 20 N | 112 20 53 W |
| Cut Bank Greasewood Canal | Canal | 1451 | Glacier | 48 37 32 N | 113 09 10 W |
| Cut Bank High School | School | 1159 | Glacier | 48 37 55 N | 112 19 48 W |
| Cut Bank John Coulee | Valley | | Glacier | 48 39 59 N | 112 47 41 W |
| Cut Bank Middle School | School | 1159 | Glacier | 48 37 55 N | 112 19 48 W |
| Cut Bank Mine | Mine | 1868 | Meagher | 46 31 03 N | 110 48 19 W |
| Cut Bank Municipal Airport | Airport | 1174 | Glacier | 48 36 30 N | 112 22 37 W |
| Cut Bank Pass | Gap | 2398 | Glacier | 48 31 13 N | 113 28 19 W |
| Cut Bank Pass Trail | Trail | 1640 | Flathead | 48 33 50 N | 113 27 15 W |
| Cut Bank Police Department | Building | 1148 | Glacier | 48 38 07 N | 112 19 49 W |
| Cut Bank Post Office | Post Office | 1149 | Glacier | 48 38 08 N | 112 19 58 W |
| Cut Bank Ranger Station | Locale | 1573 | Glacier | 48 36 22 N | 113 22 35 W |
| Cut Bank Refinery | Locale | 1178 | Glacier | 48 36 23 N | 112 14 52 W |
| Cut Bank Ridge | Ridge | 1881 | Glacier | 48 36 10 N | 113 19 46 W |
| Cut Bank Sewage Disposal Pond Dam | Dam | 1126 | Glacier | 48 38 54 N | 112 18 33 W |
| Cut Bank Sewage Lagoon Dam | Dam | 1132 | Glacier | 48 38 36 N | 112 18 33 W |
| Cut Coulee | Valley | | Custer | 46 08 41 N | 105 09 38 W |
| Cut Coulee | Valley | | Garfield | 47 50 31 N | 106 27 12 W |
| Cut Coulee | Valley | | Phillips | 48 39 42 N | 107 13 57 W |
| Cut Throat Coulee | Valley | | Valley | 47 45 30 N | 107 19 05 W |
| Cutaway Mountain | Summit | 2803 | Granite | 46 01 50 N | 113 21 53 W |
| Cutaway Pass | Gap | 2747 | Deer Lodge | 46 00 47 N | 113 22 19 W |
| Cutbank Creek | Stream | | Fergus | 47 39 10 N | 109 21 56 W |
| Cutbank Ridge | Ridge | 1028 | Fergus | 47 38 16 N | 109 17 36 W |
| Cutbank Spring | Spring | 1114 | Powder River | 45 40 02 N | 106 10 20 W |
| Cutler (historical) | Populated Place | 755 | Custer | 46 14 33 N | 105 44 52 W |