Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| West Mount Thompson Mine | Mine | 2250 | Jefferson | 46 19 30 N | 112 13 25 W |
| West Mountain | Summit | 2216 | Ravalli | 45 37 39 N | 114 21 22 W |
| West Mountain Creek | Stream | | Mineral | 47 01 13 N | 114 31 43 W |
| West Muggins Creek | Stream | | Rosebud | 46 28 03 N | 107 30 51 W |
| West Ontario Mine | Mine | 2144 | Powell | 46 25 52 N | 112 20 39 W |
| West Parks Ski Trail | Trail | 2528 | Carbon | 45 11 15 N | 109 21 03 W |
| West Parrot Creek | Stream | | Musselshell | 46 26 35 N | 108 24 07 W |
| West Pass Creek | Stream | | Big Horn | 45 02 22 N | 107 24 41 W |
| West Pass Creek | Stream | 1246 | Big Horn | 45 02 23 N | 107 24 38 W |
| West Peak | Summit | 2499 | Fergus | 46 46 47 N | 109 32 11 W |
| West Peterson Creek | Stream | | Beaverhead | 45 01 41 N | 113 24 01 W |
| West Pine Creek | Stream | | Big Horn | 45 56 50 N | 107 18 55 W |
| West Pintler Peak | Summit | 2889 | Beaverhead | 45 56 18 N | 113 30 58 W |
| West Plaza Shopping Mall | Locale | 623 | Dawson | 47 06 18 N | 104 44 10 W |
| West Plum Creek Reservoir | Reservoir | 1053 | Carter | 45 37 42 N | 104 05 60 W |
| West Poplar River Bridge | Bridge | 593 | Roosevelt | 48 06 47 N | 105 12 53 W |
| West Prairie Dog Creek | Stream | | Stillwater | 45 25 50 N | 109 45 51 W |
| West Prong Dearborn River | Stream | | Lewis and Clark | 47 04 53 N | 112 17 46 W |
| West Prong Hanging Woman Creek | Stream | | Big Horn | 45 00 04 N | 106 25 33 W |
| West Pryor Mountain | Summit | 2038 | Big Horn | 45 19 15 N | 108 36 44 W |
| West Razor Creek | Stream | | Yellowstone | 46 05 47 N | 108 23 34 W |
| West Red Lodge Creek | Stream | | Carbon | 45 19 34 N | 109 18 57 W |
| West Ridge Ski Trail | Trail | 1810 | Missoula | 47 01 25 N | 113 59 50 W |
| West Riverside | Populated Place | 1001 | Missoula | 46 52 38 N | 113 53 23 W |
| West Rosebud Creek | Stream | | Rosebud | 46 09 53 N | 106 29 01 W |
| West Rosebud Creek | Stream | | Stillwater | 45 29 01 N | 109 27 27 W |
| West Rosebud Ditch | Canal | 1403 | Stillwater | 45 26 59 N | 109 32 55 W |
| West Rosebud Lake | Lake | 1946 | Stillwater | 45 15 04 N | 109 42 35 W |
| West Rosebud Lake Dam | Dam | 1946 | Stillwater | 45 15 06 N | 109 42 33 W |
| West Rosebud State Park | Park | 768 | Rosebud | 46 15 48 N | 106 41 42 W |
| West Roundup (historical) | Locale | 978 | Musselshell | 46 25 08 N | 108 35 25 W |
| West Saint Marys Peak | Summit | 2846 | Lake | 47 18 28 N | 113 55 17 W |
| West Sanders School (historical) | School | 796 | Treasure | 46 17 41 N | 107 07 54 W |
| West Savoy Creek | Stream | | Blaine | 48 37 33 N | 108 36 23 W |
| West School | School | 1028 | Cascade | 47 30 34 N | 111 19 58 W |
| West School (historical) | School | 823 | Wibaux | 46 48 00 N | 104 27 32 W |
| West School Section Coulee | Valley | | Petroleum | 47 18 23 N | 108 09 04 W |
| West Section 28 Mine | Mine | 2314 | Madison | 45 32 43 N | 112 08 23 W |
| West Sheep Creek | Stream | | Lewis and Clark | 46 57 43 N | 112 03 41 W |
| West Sheep Creek | Stream | | Rosebud | 46 03 57 N | 106 46 52 W |
| West Sheep Creek | Stream | | Sweet Grass | 45 32 55 N | 110 03 34 W |
| West Shore Campground | Locale | 920 | Lake | 47 56 58 N | 114 11 18 W |
| West Shore Recreation Site | Locale | 921 | Lake | 47 56 59 N | 114 11 08 W |
| West Shotgun Creek | Stream | | Roosevelt | 48 12 48 N | 104 16 52 W |
| West Side Baptist Church | Church | 645 | Dawson | 47 06 40 N | 104 44 47 W |
| West Side Canal | Canal | 1549 | Beaverhead | 45 17 34 N | 112 38 16 W |
| West Side Canal | Canal | 1415 | Powell | 46 20 44 N | 112 45 20 W |
| West Side Canal Bridge | Bridge | 1560 | Beaverhead | 45 14 10 N | 112 38 23 W |
| West Side Ditch | Canal | 2154 | Beaverhead | 45 22 32 N | 113 16 58 W |
| West Side Elementary School | School | 595 | Richland | 47 42 43 N | 104 10 15 W |
| West Side Junction (historical) | Locale | 1013 | Cascade | 47 30 35 N | 111 18 53 W |
| West Side Kiwanis Park | Park | 1017 | Cascade | 47 30 35 N | 111 19 33 W |
| West Side Mine Ski Trail | Trail | 2528 | Carbon | 45 11 15 N | 109 21 03 W |
| West Side Park | Park | 1553 | Beaverhead | 45 13 10 N | 112 38 23 W |
| West Side Park | Park | 975 | Missoula | 46 52 49 N | 114 00 24 W |
| West Side Reservoir | Reservoir | 1821 | Silver Bow | 46 01 26 N | 112 33 08 W |
| West Side Rest Home | Hospital | 931 | Lake | 47 31 42 N | 114 06 40 W |
| West Silver Bow School (historical) | School | 983 | Blaine | 48 52 47 N | 108 46 15 W |
| West Snider Creek | Stream | | Rosebud | 45 55 40 N | 106 23 34 W |
| West Soap Creek | Stream | | Big Horn | 45 18 20 N | 107 46 22 W |
| West Soap Creek | Stream | | Big Horn | 45 18 22 N | 107 46 19 W |
| West Soap Creek School (historical) | School | 1180 | Big Horn | 45 14 20 N | 107 48 59 W |
| West Spring Coulee | Valley | | Rosebud | 46 20 29 N | 106 53 21 W |
| West Starved to Death 31,32 Mine | Mine | 830 | Rosebud | 46 24 20 N | 107 07 59 W |
| West Steward Mine | Mine | 1789 | Silver Bow | 46 01 06 N | 112 32 08 W |
| West Terrell Creek | Stream | | Beaverhead | 45 02 55 N | 113 24 56 W |
| West Trail Draw | Valley | | Stillwater | 45 30 54 N | 109 49 26 W |
| West Trail Draw Spring | Spring | 1808 | Sweet Grass | 45 31 37 N | 109 49 51 W |
| West Twin Creek | Stream | | Mineral | 47 22 26 N | 115 21 06 W |
| West Twin Creek | Stream | | Missoula | 46 54 43 N | 113 42 51 W |
| West Twin Creek Mine | Mine | 1189 | Mineral | 47 25 20 N | 115 21 24 W |
| West Valley | Populated Place | 1676 | Deer Lodge | 46 09 07 N | 113 01 21 W |
| West Valley Fire Department | Building | 949 | Flathead | 48 14 27 N | 114 25 03 W |
| West Valley Fire Department | Building | 924 | Flathead | 48 15 55 N | 114 18 29 W |
| West Valley Public School | School | 949 | Flathead | 48 14 25 N | 114 25 03 W |
| West Vance Creek | Stream | | Rosebud | 46 08 30 N | 106 28 16 W |
| West Virginia Mine | Mine | 955 | Flathead | 48 21 04 N | 114 01 56 W |
| West Wayside School (historical) | School | 852 | Chouteau | 47 54 31 N | 110 23 51 W |
| West Wets Creek | Stream | | Yellowstone | 45 37 35 N | 108 24 10 W |
| West White Beaver Creek | Stream | | Stillwater | 45 44 17 N | 109 29 34 W |
| West Yellowstone | Populated Place | 2031 | Gallatin | 44 39 44 N | 111 06 15 W |
| West Yellowstone Clinic | Hospital | 2033 | Gallatin | 44 39 30 N | 111 06 14 W |
| West Yellowstone District Ranger Office | Locale | 2032 | Gallatin | 44 40 08 N | 111 05 57 W |
| West Yellowstone Fire Department | Building | 2031 | Gallatin | 44 39 46 N | 111 06 10 W |
| West Yellowstone Police Department | Building | 2033 | Gallatin | 44 39 30 N | 111 06 03 W |
| West Yellowstone Post Office | Post Office | 2033 | Gallatin | 44 39 40 N | 111 05 56 W |
| West Yellowstone Public Library | Building | 2033 | Gallatin | 44 39 30 N | 111 06 13 W |
| West Yellowstone Public Schools | School | 2032 | Gallatin | 44 39 40 N | 111 06 03 W |
| West Yellowstone Town Park | Park | 2032 | Gallatin | 44 39 47 N | 111 05 60 W |
| West Yellowstone Visitor Information Center | Building | 2033 | Gallatin | 44 39 32 N | 111 06 03 W |
| West's Ranch | Locale | 658 | Valley | 48 26 25 N | 104 51 19 W |
| Westana Mobile Home Park | Populated Place | 1103 | Ravalli | 46 13 18 N | 114 08 48 W |
| Westby | Locale | 641 | Sheridan | 48 52 13 N | 104 03 07 W |
| Westby | Populated Place | 641 | Sheridan | 48 52 13 N | 104 03 07 W |
| Westby Catholic Cemetery | Cemetery | 633 | Sheridan | 48 52 53 N | 104 03 13 W |
| Westby Cemetery | Cemetery | 640 | Sheridan | 48 52 07 N | 104 03 09 W |
| Westby Post Office | Post Office | 641 | Sheridan | 48 52 17 N | 104 03 06 W |
| Westby School Center (historical) | School | 759 | Daniels | 48 35 33 N | 105 04 34 W |
| Westby Schools | School | 647 | Sheridan | 48 52 01 N | 104 03 01 W |
| Westcott School (historical) | School | 962 | Rosebud | 46 46 25 N | 106 34 57 W |
| Westerman Creek | Stream | | Missoula | 46 45 10 N | 114 12 16 W |
| Westermark Dam | Dam | 977 | Toole | 48 23 48 N | 111 36 57 W |
| Westermark Grain Corporation Elevator | Locale | 947 | Toole | 48 27 57 N | 111 28 43 W |
| Westermark Grain Corporation Elevator | Locale | 1005 | Toole | 48 30 19 N | 111 51 25 W |
| Western Gravel Spur | Locale | 636 | Dawson | 46 59 45 N | 104 45 35 W |
| Western Lumber and Grain Company Elevator (historical) | Locale | 1097 | Fergus | 47 19 11 N | 109 56 51 W |
| Western Mine | Mine | 1116 | Musselshell | 46 23 03 N | 108 28 47 W |
| Western Mines | Mine | 1616 | Fergus | 47 10 04 N | 109 16 43 W |
| Western Mines Number 1 Mine | Mine | 1447 | Fergus | 47 10 11 N | 109 17 18 W |
| Western Mines Number 2 Mine | Mine | 1601 | Fergus | 47 10 07 N | 109 16 48 W |