Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wise River (historical) | Locale | 1723 | Beaverhead | 45 47 29 N | 112 56 58 W |
| Wise River Club Campground | Locale | 1723 | Beaverhead | 45 47 29 N | 112 56 58 W |
| Wise River Ranger Station | Locale | 1728 | Beaverhead | 45 47 32 N | 112 56 36 W |
| Wisner (historical) | Locale | 1381 | Gallatin | 45 46 37 N | 111 04 56 W |
| Withey (historical) | Locale | 1102 | Pondera | 48 05 60 N | 111 54 41 W |
| Witt Ranch | Locale | 980 | Chouteau | 48 03 52 N | 111 03 51 W |
| Wittmayer Ranch | Locale | 811 | Valley | 47 49 16 N | 106 52 37 W |
| Wolf Creek | Locale | 1086 | Lewis and Clark | 47 00 22 N | 112 04 09 W |
| Wolf Creek Bridge Fishing Access Site | Locale | 1059 | Lewis and Clark | 47 01 04 N | 112 00 46 W |
| Wolf Creek Gaging Station | Locale | 1057 | Lewis and Clark | 46 59 41 N | 112 00 40 W |
| Wolf Creek Quarry (historical) | Locale | 1092 | Lewis and Clark | 46 59 43 N | 112 04 33 W |
| Wolf Creek Ranch | Locale | 1736 | Madison | 44 58 45 N | 111 38 58 W |
| Wolf Mountain Battlefield (historical) | Locale | 1018 | Rosebud | 45 17 08 N | 106 33 35 W |
| Wolf Point | Locale | 611 | Roosevelt | 48 05 30 N | 105 38 34 W |
| Wolf Prairie | Locale | 910 | Lincoln | 48 20 26 N | 115 02 21 W |
| Wolf Ranch | Locale | 1080 | Big Horn | 45 15 13 N | 107 45 01 W |
| Wolfe Ranch | Locale | 839 | Big Horn | 46 02 07 N | 107 30 13 W |
| Wolfe Ranch | Locale | 1453 | Park | 45 51 39 N | 110 35 17 W |
| Wolsey (historical) | Locale | 1813 | Meagher | 46 46 27 N | 110 48 21 W |
| Wolstad Ranch | Locale | 1163 | Pondera | 48 21 50 N | 112 24 00 W |
| Wonder Ranch | Locale | 1837 | Madison | 45 06 10 N | 111 34 02 W |
| Wonderly Ranch | Locale | 1698 | Madison | 45 07 52 N | 112 07 29 W |
| Wood Lake Campground | Locale | 1763 | Lewis and Clark | 47 25 40 N | 112 47 37 W |
| Wood Lot Fishing Access Site | Locale | 1020 | Ravalli | 46 25 36 N | 114 07 25 W |
| Wood Ranch | Locale | 1099 | Toole | 48 50 20 N | 111 29 16 W |
| Wood Siding (historical) | Locale | 1129 | Lewis and Clark | 46 57 12 N | 112 06 23 W |
| Woodard Ranch | Locale | 971 | Rosebud | 45 17 53 N | 106 30 14 W |
| Woodbine Campground | Locale | 1592 | Stillwater | 45 21 08 N | 109 53 47 W |
| Wooden Shoe Camp | Locale | 1530 | Cascade | 46 58 18 N | 111 39 46 W |
| Woodin (historical) | Locale | 1699 | Silver Bow | 45 48 41 N | 112 42 32 W |
| Woodland RV Park | Locale | 636 | Lincoln | 48 23 50 N | 115 34 29 W |
| Woodlin | Locale | 751 | Sanders | 47 34 30 N | 115 15 59 W |
| Woodrow | Locale | 783 | Dawson | 47 11 18 N | 105 03 50 W |
| Woodruff Park | Locale | 977 | Custer | 46 23 06 N | 105 36 06 W |
| Woods Bay Campground | Locale | 883 | Flathead | 48 00 10 N | 114 03 59 W |
| Woods Bay Fishing Access Site | Locale | 895 | Lake | 48 00 16 N | 114 03 58 W |
| Woodside (historical) | Locale | 1063 | Ravalli | 46 18 48 N | 114 09 18 W |
| Woodside Bridge Fishing Access Site | Locale | 1056 | Ravalli | 46 18 53 N | 114 08 35 W |
| Woodville (historical) | Locale | 1935 | Jefferson | 46 03 08 N | 112 26 46 W |
| Woodward Ranch | Locale | 1647 | Jefferson | 45 52 20 N | 111 52 06 W |
| Woody Creek Camp | Locale | 951 | Big Horn | 45 32 42 N | 107 48 36 W |
| Wooldridge | Locale | 674 | Phillips | 48 25 37 N | 107 31 17 W |
| Wooldridge's Ranch | Locale | 653 | Valley | 48 24 05 N | 107 01 09 W |
| Wooster Ranch | Locale | 1195 | Flathead | 47 59 45 N | 114 31 22 W |
| Wounded Buck Vista | Locale | 1114 | Flathead | 48 17 37 N | 113 56 02 W |
| Wraith Hill Ski Area | Locale | 2036 | Deer Lodge | 46 10 19 N | 113 12 42 W |
| Wright (historical) | Locale | 1390 | Wheatland | 46 33 08 N | 109 50 09 W |
| Wrong Creek Guard Station | Locale | 1748 | Teton | 47 52 52 N | 112 55 56 W |
| Wylie Camp (historical) | Locale | 1586 | Gallatin | 45 29 40 N | 111 16 23 W |
| Wyno (historical) | Locale | 2095 | Beaverhead | 44 50 55 N | 113 14 39 W |
| Wyola | Locale | 1134 | Big Horn | 45 07 45 N | 107 23 37 W |
| Xenia (historical) | Locale | 879 | Hill | 48 34 53 N | 110 13 33 W |
| Y Lazy R RV Park | Locale | 1459 | Glacier | 48 26 24 N | 113 13 00 W |
| Yaak Campground | Locale | 565 | Lincoln | 48 33 47 N | 115 58 29 W |
| Yaak Community Center | Locale | 925 | Lincoln | 48 51 20 N | 115 40 02 W |
| Yaak River Campground | Locale | 562 | Lincoln | 48 33 37 N | 115 58 30 W |
| Yaaps Corner | Locale | 989 | Fergus | 47 35 01 N | 109 23 17 W |
| Yablonski Ranch | Locale | 981 | Rosebud | 46 39 33 N | 107 28 55 W |
| Yakt | Locale | 568 | Lincoln | 48 32 44 N | 115 58 08 W |
| Yamhill (historical) | Locale | 1579 | Powell | 46 30 02 N | 112 57 03 W |
| Yankee Jim Campground and Picnic Area | Locale | 1561 | Park | 45 10 47 N | 110 52 54 W |
| Yankee Jim Canyon Point of Interest | Locale | 1586 | Park | 45 10 06 N | 110 51 45 W |
| Yarnell Island Campground | Locale | 766 | Lincoln | 48 27 32 N | 115 17 47 W |
| Yates | Locale | 838 | Wibaux | 46 56 50 N | 104 06 29 W |
| Yates Cabin | Locale | 1745 | Stillwater | 45 32 24 N | 109 48 07 W |
| Yeager Ranch | Locale | 1349 | Teton | 47 49 19 N | 112 30 32 W |
| Yeak Falls Campground | Locale | 734 | Lincoln | 48 38 41 N | 115 53 09 W |
| Yellow Bay (historical) | Locale | 888 | Lake | 47 52 35 N | 114 01 48 W |
| Yellow Bay Campground | Locale | 888 | Lake | 47 52 35 N | 114 01 45 W |
| Yellow Mule Ranger Station | Locale | 2647 | Madison | 45 10 32 N | 111 25 34 W |
| Yellowstone (historical) | Locale | 2032 | Gallatin | 44 39 30 N | 111 06 18 W |
| Yellowstone Bible Encampment | Locale | 1711 | Park | 45 18 05 N | 110 33 38 W |
| Yellowstone Camp | Locale | 2075 | Ravalli | 46 07 37 N | 113 57 16 W |
| Yellowstone City (historical) | Locale | 1636 | Park | 45 19 15 N | 110 42 33 W |
| Yellowstone Edge RV Park | Locale | 1523 | Park | 45 24 50 N | 110 42 28 W |
| Yellowstone Gateway Mall | Locale | 1381 | Park | 45 39 18 N | 110 34 18 W |
| Yellowstone Park KOA Campground | Locale | 2031 | Gallatin | 44 41 15 N | 111 14 26 W |
| Yellowstone River Trout Hatchery | Locale | 1232 | Sweet Grass | 45 50 10 N | 109 57 36 W |
| Yellowstone-Bighorn Research Camp | Locale | 2079 | Carbon | 45 07 19 N | 109 16 23 W |
| Yemen | Locale | 1010 | Chouteau | 47 42 30 N | 110 43 33 W |
| YMCA Camp Child | Locale | 1599 | Powell | 46 31 27 N | 112 23 33 W |
| Yonkee Cutoff | Locale | 1197 | Powder River | 45 09 38 N | 106 03 04 W |
| York Bridge Fishing Access Site | Locale | 1122 | Lewis and Clark | 46 42 48 N | 111 48 14 W |
| Yost Ranch | Locale | 1302 | Sweet Grass | 45 50 29 N | 110 02 56 W |
| Youngs Creek Ford | Locale | 1436 | Powell | 47 26 44 N | 113 11 01 W |
| Youngs Point | Locale | 1046 | Stillwater | 45 36 44 N | 109 00 28 W |
| Youngstrom Ranch | Locale | 1633 | Carbon | 45 16 39 N | 109 27 17 W |
| Yucca Golf Club | Locale | 1028 | Cascade | 47 15 49 N | 111 42 11 W |
| Yules Spur (historical) | Locale | 1488 | Cascade | 47 02 30 N | 110 47 24 W |
| Yuleville (historical) | Locale | 1488 | Cascade | 47 02 30 N | 110 47 24 W |
| Zebarth Ranch | Locale | 1989 | Beaverhead | 45 29 32 N | 113 36 32 W |
| Zehntner Ranch | Locale | 1518 | Meagher | 46 55 57 N | 111 07 51 W |
| Zempel Ranch | Locale | 813 | Rosebud | 46 30 08 N | 107 01 15 W |
| Zenith (historical) | Locale | 1686 | Jefferson | 46 19 38 N | 112 03 48 W |
| Zent Hardware Company Elevator (historical) | Locale | 811 | Treasure | 46 17 34 N | 107 14 03 W |
| Zim Elevator | Locale | 1121 | Teton | 47 55 46 N | 111 54 37 W |
| Zosel (historical) | Locale | 1931 | Powell | 46 22 32 N | 112 34 33 W |
| Zurich | Locale | 727 | Blaine | 48 34 60 N | 109 01 54 W |
| Camp Baker Military Reservation (historical) | Military (Historical) | 1414 | Meagher | 46 40 43 N | 111 10 19 W |
| Camp Cooke (historical) | Military (Historical) | 741 | Fergus | 47 43 58 N | 109 40 34 W |
| Camp Crook (historical) | Military (Historical) | 1037 | Rosebud | 45 37 60 N | 106 40 00 W |
| Camp Cummings (historical) | Military (Historical) | 1759 | Madison | 45 17 38 N | 111 56 43 W |
| Camp Lewis (historical) | Military (Historical) | 1197 | Fergus | 47 04 06 N | 109 25 15 W |
| Camp Merritt (historical) | Military (Historical) | 1037 | Rosebud | 45 37 60 N | 106 40 00 W |
| Camp Morris (historical) | Military (Historical) | 1202 | Liberty | 48 54 30 N | 111 15 08 W |
| Camp Poplar River (historical) | Military (Historical) | 607 | Roosevelt | 48 06 47 N | 105 11 52 W |
| Camp Porter (historical) | Military (Historical) | 621 | Dawson | 47 09 03 N | 104 41 33 W |
| Camp Reeve (historical) | Military (Historical) | 685 | Petroleum | 47 27 21 N | 107 54 50 W |
| Camp Robert B Smith (historical) | Military (Historical) | 1608 | Lewis and Clark | 46 35 25 N | 112 04 00 W |
| Cantonment Rocky Point (historical) | Military (Historical) | 693 | Fergus | 47 36 00 N | 108 26 15 W |