Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Toole County Sheriffs Department | Building | 1003 | Toole | 48 30 22 N | 111 51 16 W |
| Towe Ford Museum | Building | 1381 | Powell | 46 23 33 N | 112 44 10 W |
| Townsend Fire Station | Building | 1172 | Broadwater | 46 19 11 N | 111 31 01 W |
| Traphagen Hall | Building | 1497 | Gallatin | 45 39 60 N | 111 03 01 W |
| Trask Hall (historical) | Building | 1392 | Powell | 46 23 45 N | 112 43 48 W |
| Treasure County 89ers Museum | Building | 811 | Treasure | 46 17 34 N | 107 14 03 W |
| Treasure County Courthouse | Building | 811 | Treasure | 46 17 30 N | 107 14 00 W |
| Treasure County Sheriff | Building | 811 | Treasure | 46 17 30 N | 107 14 00 W |
| Troy Branch Library | Building | 584 | Lincoln | 48 27 45 N | 115 53 34 W |
| Troy Fire Department | Building | 581 | Lincoln | 48 27 47 N | 115 53 27 W |
| Troy Museum and Visitor Center | Building | 582 | Lincoln | 48 27 26 N | 115 53 29 W |
| Troy Police Department | Building | 581 | Lincoln | 48 27 47 N | 115 53 27 W |
| Turner Hall | Building | 980 | Missoula | 46 51 39 N | 113 59 14 W |
| Twin Bridges Public Library | Building | 1412 | Madison | 45 32 40 N | 112 19 52 W |
| Two Medicine Community Center | Building | 1207 | Glacier | 48 28 55 N | 112 47 29 W |
| Ullman Center | Building | 653 | Dawson | 47 05 06 N | 104 43 38 W |
| United States Forest Service Lab | Building | 984 | Missoula | 46 51 27 N | 113 59 02 W |
| University Center | Building | 983 | Missoula | 46 51 39 N | 113 58 58 W |
| University Hall | Building | 984 | Missoula | 46 51 36 N | 113 59 02 W |
| University of Great Falls Library | Building | 1048 | Cascade | 47 29 27 N | 111 16 14 W |
| Upper Blackfoot Historical Society Museum | Building | 1384 | Lewis and Clark | 46 57 18 N | 112 40 54 W |
| Upper Musselshell Historical Society Museum | Building | 1283 | Wheatland | 46 26 07 N | 109 49 53 W |
| Utica Museum | Building | 1364 | Judith Basin | 46 58 06 N | 110 05 33 W |
| Valier Public Library | Building | 1161 | Pondera | 48 18 30 N | 112 15 13 W |
| Valley County Courthouse | Building | 637 | Valley | 48 11 34 N | 106 38 16 W |
| Valley County Pioneer Museum | Building | 640 | Valley | 48 12 16 N | 106 38 27 W |
| Valley View Community Center | Building | 919 | Lake | 47 38 44 N | 114 16 10 W |
| Vande Bogart Library | Building | 785 | Hill | 48 32 30 N | 109 41 16 W |
| Victor Heritage Museum | Building | 1040 | Ravalli | 46 25 03 N | 114 08 57 W |
| Victorian Village Museum | Building | 1250 | Sweet Grass | 45 49 27 N | 109 58 18 W |
| Virginia City Fire Department | Building | 1756 | Madison | 45 17 38 N | 111 56 46 W |
| Visual Communications Building | Building | 1495 | Gallatin | 45 39 56 N | 111 03 05 W |
| Washoe Theater | Building | 1609 | Deer Lodge | 46 07 41 N | 112 57 11 W |
| Wedsworth Memorial Library | Building | 1032 | Cascade | 47 16 15 N | 111 41 58 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 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 Public Library | Building | 2033 | Gallatin | 44 39 30 N | 111 06 13 W |
| West Yellowstone Visitor Information Center | Building | 2033 | Gallatin | 44 39 32 N | 111 06 03 W |
| Western Montana College Gallery/Museum | Building | 1565 | Beaverhead | 45 12 30 N | 112 38 18 W |
| Wheatland County Courthouse | Building | 1285 | Wheatland | 46 26 12 N | 109 50 10 W |
| Wheatland County Sheriffs Office | Building | 1288 | Wheatland | 46 26 14 N | 109 50 10 W |
| White Sulphur Springs Fire Department | Building | 1535 | Meagher | 46 32 57 N | 110 54 16 W |
| Whitefish Branch Library | Building | 923 | Flathead | 48 24 40 N | 114 20 16 W |
| Whitefish Fire Department | Building | 923 | Flathead | 48 24 40 N | 114 20 15 W |
| Whitefish Fire Department | Building | 931 | Flathead | 48 20 34 N | 114 17 53 W |
| Whitefish Police Department | Building | 923 | Flathead | 48 24 40 N | 114 20 15 W |
| Whitehall Fire Department | Building | 1330 | Jefferson | 45 52 15 N | 112 06 13 W |
| Whitehall Fire Hall | Building | 1330 | Jefferson | 45 52 15 N | 112 06 13 W |
| Whitehall Museum | Building | 1329 | Jefferson | 45 52 15 N | 112 05 51 W |
| Whitehall Police Department | Building | 1330 | Jefferson | 45 52 15 N | 112 06 13 W |
| Wibaux County Courthouse | Building | 812 | Wibaux | 46 59 09 N | 104 11 19 W |
| Wibaux County Sheriff | Building | 812 | Wibaux | 46 59 09 N | 104 11 19 W |
| Wibaux Fire Department | Building | 812 | Wibaux | 46 59 11 N | 104 11 24 W |
| Wibaux Public Library | Building | 814 | Wibaux | 46 59 11 N | 104 11 17 W |
| Wibaux Visitor Information Center | Building | 811 | Wibaux | 46 59 13 N | 104 11 11 W |
| Wildlife Museum | Building | 740 | Blaine | 48 35 29 N | 109 13 53 W |
| Wildlife Museum | Building | 924 | Powder River | 45 26 12 N | 105 24 27 W |
| Wildlife Museum of the West | Building | 1506 | Madison | 45 20 56 N | 111 43 47 W |
| William K Kohrs Memorial Library | Building | 1384 | Powell | 46 23 57 N | 112 43 53 W |
| Wilson Hall | Building | 1495 | Gallatin | 45 40 07 N | 111 02 54 W |
| Winnett Fire Department | Building | 900 | Petroleum | 47 00 11 N | 108 21 03 W |
| Wisdom Fire Department | Building | 1844 | Beaverhead | 45 37 05 N | 113 27 03 W |
| Wise River Fire Department | Building | 1723 | Beaverhead | 45 47 29 N | 112 56 58 W |
| Wolf Creek Hall | Building | 760 | Sheridan | 48 39 26 N | 105 00 19 W |
| Wolf Creek Volunteer Fire Department | Building | 1086 | Lewis and Clark | 47 00 22 N | 112 04 09 W |
| Wolf Point Area Historical Society Museum | Building | 608 | Roosevelt | 48 05 22 N | 105 38 19 W |
| Wolf Point Fire Department | Building | 609 | Roosevelt | 48 05 22 N | 105 38 43 W |
| Wolf Point Police Department | Building | 609 | Roosevelt | 48 05 22 N | 105 38 42 W |
| Wood Lab | Building | 1483 | Gallatin | 45 40 15 N | 111 03 06 W |
| Woods Bay Fire Department | Building | 928 | Lake | 48 00 23 N | 114 03 28 W |
| World Museum of Mining | Building | 1736 | Silver Bow | 46 00 35 N | 112 33 55 W |
| Yesterdays Playthings Doll and Toy Museum | Building | 1381 | Powell | 46 23 33 N | 112 44 10 W |
| A 4 Canal | Canal | 1151 | Pondera | 48 20 42 N | 112 18 15 W |
| A Canal | Canal | 1154 | Pondera | 48 20 05 N | 112 17 19 W |
| A Lateral | Canal | 941 | Lake | 47 31 04 N | 114 04 33 W |
| A Six Lateral | Canal | 934 | Lake | 47 31 01 N | 114 05 50 W |
| Ackley Lake Feeder Canal | Canal | 1322 | Judith Basin | 46 58 05 N | 109 58 39 W |
| Ackley Lake Outlet Canal | Canal | 1302 | Judith Basin | 46 58 49 N | 109 57 28 W |
| Agency Canal | Canal | 915 | Big Horn | 45 39 45 N | 107 29 39 W |
| Agricultural Ditch | Canal | 1494 | Madison | 45 47 30 N | 111 57 24 W |
| Albers River Ditch | Canal | 1497 | Beaverhead | 45 20 17 N | 112 33 02 W |
| Alder Creek Ditch | Canal | 1450 | Sanders | 47 45 21 N | 114 45 38 W |
| Alkali Siphon | Canal | 979 | Yellowstone | 45 48 19 N | 108 29 24 W |
| Allen Dale Ditch | Canal | 1328 | Granite | 46 36 17 N | 113 15 23 W |
| Allendale Ditch | Canal | 1332 | Granite | 46 36 42 N | 113 13 42 W |
| Allison Lewis Ditch | Canal | 1479 | Gallatin | 45 36 60 N | 111 12 05 W |
| American Fork Ranch Ditch | Canal | 1759 | Sweet Grass | 46 12 47 N | 110 07 58 W |
| Ampo Ditch | Canal | 1930 | Deer Lodge | 45 51 59 N | 113 20 58 W |
| Ampo Toomey Ditch | Canal | 1843 | Deer Lodge | 45 49 51 N | 113 19 05 W |
| AN Canal | Canal | 1111 | Pondera | 48 23 03 N | 112 08 11 W |
| AN Six Canal | Canal | 1119 | Pondera | 48 22 59 N | 112 15 05 W |
| AN Two Canal | Canal | 1140 | Pondera | 48 21 38 N | 112 15 08 W |
| Anderson Ditch | Canal | 1861 | Deer Lodge | 45 53 06 N | 113 14 17 W |
| Anderson Vose Ditch | Canal | 1585 | Sweet Grass | 46 06 08 N | 110 01 03 W |
| Andrews Ditch | Canal | 1437 | Carbon | 45 19 23 N | 109 19 18 W |
| Antelope Basin Ditch | Canal | 1593 | Carbon | 45 20 24 N | 109 31 34 W |
| Antilla Ditch | Canal | 1430 | Carbon | 45 20 25 N | 109 15 23 W |
| Armitage Ditch | Canal | 1802 | Madison | 45 02 18 N | 111 36 43 W |
| Armstrong Ditch | Canal | 1635 | Gallatin | 45 35 23 N | 111 07 47 W |
| Arneson Ditch | Canal | 1246 | Sweet Grass | 45 51 12 N | 109 57 21 W |
| Arnold Ditch | Canal | 962 | Rosebud | 45 18 46 N | 106 32 59 W |
| Arnold Drain | Canal | 982 | Yellowstone | 45 46 57 N | 108 34 02 W |
| Arthun Ditch | Canal | 1293 | Stillwater | 45 30 42 N | 109 31 15 W |
| Ashley Creek Ditch | Canal | 943 | Flathead | 48 13 17 N | 114 24 17 W |
| Auwater Ditch | Canal | 1291 | Sweet Grass | 45 54 24 N | 109 53 52 W |
| Ayotte Ditch | Canal | 1538 | Madison | 45 21 54 N | 112 08 38 W |
| B Canal | Canal | 1222 | Pondera | 48 14 18 N | 112 31 05 W |
| B Four Ditch | Canal | 1189 | Pondera | 48 15 49 N | 112 23 15 W |