Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| River Junction Fishing Access Site | Locale | 1231 | Powell | 46 59 08 N | 113 08 10 W |
| River of Life Christian School | School | 1033 | Cascade | 47 30 44 N | 111 16 42 W |
| River of Life Church | Church | 1034 | Cascade | 47 30 42 N | 111 16 43 W |
| River Point Campground | Locale | 1219 | Missoula | 47 11 14 N | 113 30 52 W |
| River Post Office (historical) | Post Office | 909 | Flathead | 48 19 60 N | 114 13 53 W |
| River Ridge | Ridge | 2140 | Gallatin | 45 05 08 N | 111 12 47 W |
| River Run Campground | Locale | 790 | Hill | 48 36 05 N | 109 56 13 W |
| River School (historical) | School | 662 | Phillips | 48 32 06 N | 107 21 13 W |
| River Side Ranch | Locale | 1352 | Madison | 45 44 49 N | 112 11 28 W |
| River Trail Park | Park | 923 | Flathead | 48 24 40 N | 114 20 15 W |
| River Trail Park | Park | 916 | Flathead | 48 24 07 N | 114 20 03 W |
| River View Ditch | Canal | 1184 | Carbon | 45 06 41 N | 108 59 60 W |
| Riverbend | Populated Place | 845 | Mineral | 47 09 07 N | 114 49 59 W |
| Riverdale | Populated Place | 1022 | Cascade | 47 20 48 N | 111 35 34 W |
| Riverdale School (historical) | School | 1066 | Cascade | 47 22 40 N | 111 36 08 W |
| Riverfront RV Park | Locale | 1333 | Powell | 46 31 24 N | 112 48 42 W |
| Riverfront RV Park and Cabins | Locale | 740 | Sanders | 47 36 23 N | 115 22 24 W |
| Rivers Creek | Stream | | Mineral | 47 21 14 N | 115 26 00 W |
| Rivers Edge Mobile Home Park | Populated Place | 650 | Lincoln | 48 24 38 N | 115 30 54 W |
| Rivers Peak | Summit | 1611 | Mineral | 47 20 27 N | 115 27 59 W |
| Rivershore Mobile Home Park | Populated Place | 1012 | Cascade | 47 28 20 N | 111 18 38 W |
| Riverside | Populated Place | 2021 | Gallatin | 44 39 35 N | 111 04 18 W |
| Riverside | Populated Place | 978 | Musselshell | 46 25 54 N | 108 34 21 W |
| Riverside | Populated Place | 1072 | Ravalli | 46 16 29 N | 114 09 29 W |
| Riverside (historical) | Locale | 1476 | Park | 45 24 19 N | 110 42 05 W |
| Riverside (historical) | Locale | 1072 | Ravalli | 46 16 29 N | 114 09 29 W |
| Riverside (historical) | Populated Place | 751 | Lincoln | 48 55 30 N | 115 10 46 W |
| Riverside (historical) | Populated Place | 642 | Valley | 48 15 44 N | 106 44 17 W |
| Riverside Addition (subdivision) | Populated Place | 1372 | Park | 45 39 45 N | 110 33 40 W |
| Riverside Alliance Church | Church | 891 | Flathead | 48 14 28 N | 114 17 28 W |
| Riverside Bay | Bay | 1086 | Flathead | 48 16 57 N | 113 49 15 W |
| Riverside Boat Landing | Locale | 1086 | Flathead | 48 16 17 N | 113 48 58 W |
| Riverside Campground | Locale | 1132 | Lewis and Clark | 46 39 22 N | 111 43 60 W |
| Riverside Cemetery | Cemetery | 874 | Chouteau | 47 50 20 N | 110 38 33 W |
| Riverside Cemetery | Cemetery | 679 | McCone | 47 53 50 N | 105 17 03 W |
| Riverside Cemetery | Cemetery | 973 | Yellowstone | 45 49 19 N | 108 26 44 W |
| Riverside Church | Church | 607 | Roosevelt | 48 06 18 N | 104 59 06 W |
| Riverside Country Club | Locale | 1408 | Gallatin | 45 43 38 N | 111 03 45 W |
| Riverside Creek | Stream | | Flathead | 48 17 18 N | 113 48 32 W |
| Riverside Family Clinic | Hospital | 607 | Roosevelt | 48 06 47 N | 105 11 54 W |
| Riverside Health Care Center | Hospital | 968 | Missoula | 46 52 36 N | 114 00 36 W |
| Riverside Inn | Locale | 1209 | Stillwater | 45 32 12 N | 109 25 13 W |
| Riverside Medical Clinic | Hospital | 831 | Mineral | 47 11 25 N | 114 52 45 W |
| Riverside Park | Park | 1012 | Cascade | 47 30 48 N | 111 18 11 W |
| Riverside Park | Park | 723 | Custer | 46 24 09 N | 105 51 21 W |
| Riverside Park | Park | 915 | Flathead | 48 24 25 N | 114 20 16 W |
| Riverside Park | Park | 885 | Lake | 47 41 38 N | 114 09 53 W |
| Riverside Park | Park | 782 | Lincoln | 48 52 40 N | 115 03 11 W |
| Riverside Park | Park | 767 | Rosebud | 46 16 13 N | 106 40 52 W |
| Riverside Park Boat Ramp | Locale | 995 | Yellowstone | 45 39 13 N | 108 44 56 W |
| Riverside Post Office (historical) | Post Office | 663 | Dawson | 47 43 20 N | 105 15 43 W |
| Riverside Post Office (historical) | Post Office | 751 | Lincoln | 48 55 30 N | 115 10 46 W |
| Riverside Post Office (historical) | Post Office | 1476 | Park | 45 24 19 N | 110 42 05 W |
| Riverside Post Office (historical) | Post Office | 1072 | Ravalli | 46 16 29 N | 114 09 29 W |
| Riverside Ranch | Locale | 1202 | Broadwater | 46 10 29 N | 111 30 44 W |
| Riverside RV Park | Locale | 1072 | Ravalli | 46 16 29 N | 114 09 29 W |
| Riverside School (historical) | School | 1202 | Broadwater | 46 11 45 N | 111 30 50 W |
| Riverside School (historical) | School | 1351 | Gallatin | 45 46 30 N | 111 14 23 W |
| Riverside School (historical) | School | 606 | Roosevelt | 48 06 16 N | 104 59 12 W |
| Riverside School (historical) | School | 807 | Treasure | 46 16 46 N | 107 16 45 W |
| Riverside School (historical) | School | 644 | Valley | 48 15 45 N | 106 44 17 W |
| Riverside Trailer Court | Populated Place | 1428 | Gallatin | 45 40 30 N | 111 12 28 W |
| Riverside Trailer Court | Populated Place | 757 | Hill | 48 33 40 N | 109 39 13 W |
| Riverside Trailer Court | Populated Place | 686 | Phillips | 48 21 40 N | 107 52 27 W |
| Riverview | Locale | 651 | Lincoln | 48 21 40 N | 115 19 14 W |
| Riverview | Populated Place | 593 | Richland | 47 40 27 N | 104 10 30 W |
| Riverview (historical) | Locale | 593 | Richland | 47 40 25 N | 104 10 33 W |
| Riverview Campground | Locale | 1122 | Glacier | 48 38 02 N | 112 20 35 W |
| Riverview Cemetery | Cemetery | 746 | McCone | 47 24 20 N | 105 34 37 W |
| Riverview Cemetery | Cemetery | 1008 | Ravalli | 46 29 55 N | 114 05 57 W |
| Riverview Cemetery | Cemetery | 608 | Richland | 47 26 43 N | 104 20 42 W |
| Riverview Cemetery | Cemetery | 646 | Roosevelt | 48 09 40 N | 104 54 52 W |
| Riverview Colony | Populated Place | 974 | Liberty | 48 10 38 N | 111 01 53 W |
| Riverview Colony School | School | 974 | Liberty | 48 10 38 N | 111 01 53 W |
| Riverview Mountain | Summit | 1945 | Flathead | 48 22 01 N | 113 36 58 W |
| Riverview Mountain | Summit | 1500 | Lincoln | 48 19 37 N | 115 16 16 W |
| Riverview Park | Park | 1026 | Cascade | 47 31 25 N | 111 19 03 W |
| Riverview Park | Park | 687 | Phillips | 48 21 10 N | 107 53 32 W |
| Riverview Post Office (historical) | Post Office | 1181 | Carbon | 45 06 15 N | 109 01 23 W |
| Riverview Post Office (historical) | Post Office | 593 | Richland | 47 40 26 N | 104 10 32 W |
| Riverview School | School | 1026 | Cascade | 47 31 27 N | 111 18 53 W |
| Riverview School (historical) | School | 1181 | Carbon | 45 06 15 N | 109 01 23 W |
| Riverview School (historical) | School | 781 | Custer | 46 14 38 N | 105 16 22 W |
| Riverview School (historical) | School | 589 | Richland | 48 06 26 N | 104 36 38 W |
| Riverview Trailer Park | Populated Place | 818 | Mineral | 47 11 42 N | 114 53 10 W |
| Rivets Post (historical) | Locale | 678 | Phillips | 48 35 00 N | 107 41 02 W |
| Rivulet | Locale | 890 | Mineral | 47 00 18 N | 114 44 30 W |
| Rivulet Peak | Summit | 1441 | Mineral | 46 59 27 N | 114 45 01 W |
| Rivulet Post Office (historical) | Post Office | 890 | Mineral | 47 00 18 N | 114 44 30 W |
| RO Smith Number 1 Dam | Dam | 862 | Rosebud | 46 30 06 N | 106 25 38 W |
| Roach Coulee | Valley | | Treasure | 46 18 45 N | 107 03 47 W |
| Roach Coulee 8,9 Mine | Mine | 821 | Treasure | 46 22 40 N | 107 06 42 W |
| Roach Gulch | Valley | | Fergus | 47 33 09 N | 108 41 06 W |
| Road Agents Rock | Pillar | 2032 | Beaverhead | 45 11 48 N | 112 58 12 W |
| Road Coulee | Valley | | Musselshell | 46 16 56 N | 108 37 31 W |
| Road Coulee | Valley | | Teton | 47 44 40 N | 112 06 23 W |
| Road Coulee | Valley | | Valley | 48 09 08 N | 107 16 56 W |
| Road Creek | Stream | | Custer | 45 48 09 N | 105 24 29 W |
| Road Creek | Stream | | Custer | 45 55 14 N | 105 39 21 W |
| Road Creek | Stream | | Custer | 45 55 17 N | 105 53 57 W |
| Road Creek | Stream | | Powder River | 45 30 04 N | 105 38 33 W |
| Road Creek | Stream | | Powder River | 45 38 10 N | 105 16 38 W |
| Road Creek | Stream | | Powder River | 45 32 28 N | 105 31 54 W |
| Road Creek | Stream | | Powder River | 45 35 51 N | 105 15 08 W |
| Road Creek Reservoir | Reservoir | 1103 | Powder River | 45 39 13 N | 105 59 56 W |
| Road Draw | Valley | | Custer | 46 02 27 N | 105 03 13 W |
| Road Gulch | Valley | | Meagher | 46 41 06 N | 111 20 35 W |
| Road Reservoir | Reservoir | 1189 | Powder River | 45 14 20 N | 105 59 15 W |
| Road Reservoir | Reservoir | 656 | Valley | 48 01 22 N | 106 42 39 W |
| Road Reservoir Dam | Dam | 656 | Valley | 48 01 24 N | 106 42 38 W |