Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| N Barnett Number 1 Dam | Dam | 867 | Petroleum | 47 16 42 N | 108 24 50 W |
| N Barrett Number 2 Dam | Dam | 884 | Petroleum | 47 15 42 N | 108 23 38 W |
| N Canal | Canal | 1174 | Missoula | 47 06 13 N | 114 01 40 W |
| N Canal | Canal | 1161 | Pondera | 48 27 15 N | 112 22 35 W |
| N E Olsen Number 1 Dam | Dam | 797 | Garfield | 47 25 18 N | 106 47 20 W |
| N F Spring | Spring | 1111 | Carter | 45 36 08 N | 104 06 09 W |
| N P Number 3 Dam | Dam | 737 | Custer | 46 30 54 N | 105 20 56 W |
| N Section 5 Prospects Mine | Mine | 1435 | Lewis and Clark | 46 44 32 N | 111 45 41 W |
| N-Bar School (historical) | School | 1357 | Fergus | 46 51 56 N | 108 59 39 W |
| N-F Ditch | Canal | 963 | Musselshell | 46 27 51 N | 108 28 16 W |
| Naasz School (historical) | School | 843 | Prairie | 47 08 04 N | 106 04 04 W |
| Nabbs Spur (historical) | Locale | 1499 | Granite | 46 25 55 N | 113 16 13 W |
| Nada Mine | Mine | 1674 | Broadwater | 46 07 54 N | 111 44 23 W |
| Nada Mine | Mine | 1682 | Broadwater | 46 07 57 N | 111 44 22 W |
| Naderman Buttes | Summit | 1159 | Musselshell | 46 25 04 N | 108 47 27 W |
| Naderman Dam | Dam | 997 | Musselshell | 46 20 26 N | 108 41 02 W |
| Naderman Ditch | Canal | 992 | Musselshell | 46 22 42 N | 108 38 17 W |
| Nagos | Populated Place | 1087 | Missoula | 46 59 30 N | 114 06 46 W |
| Nagy Farms Incorporated Elevator | Locale | 1066 | Toole | 48 59 46 N | 111 57 38 W |
| Nahrgang Dam | Dam | 883 | Liberty | 48 17 36 N | 110 48 39 W |
| Nahsukin Lake | Lake | 1650 | Glacier | 48 49 57 N | 113 58 40 W |
| Nahsukin Mountain | Summit | 2491 | Flathead | 48 50 28 N | 113 59 22 W |
| Naismith | Locale | 931 | Toole | 48 23 11 N | 111 46 28 W |
| Naismith | Populated Place | 931 | Toole | 48 23 11 N | 111 46 28 W |
| Nance Coulee | Valley | | Chouteau | 47 35 56 N | 109 51 04 W |
| Nancy Creek | Stream | | Sanders | 47 42 23 N | 114 46 53 W |
| Nancy Hanks Mine | Mine | 1843 | Granite | 46 49 38 N | 113 20 45 W |
| Nancy Hanks/Faith/Hope Mine | Mine | 1439 | Jefferson | 46 32 37 N | 111 58 42 W |
| Nancy Lee Millsite | Mine | 1013 | Mineral | 47 15 55 N | 114 56 24 W |
| Nancy Lee Mine | Mine | 1164 | Mineral | 47 16 19 N | 114 57 03 W |
| Nancy Lee Mine | Mine | 1132 | Mineral | 47 16 12 N | 114 57 15 W |
| Nancy Lee/Fawcett Mine | Mine | 1272 | Mineral | 47 16 33 N | 114 57 05 W |
| Nannastead Coulee | Valley | | Garfield | 47 21 15 N | 106 26 57 W |
| Nannie Basin | Basin | 2346 | Powell | 47 26 30 N | 113 20 04 W |
| Nanny Creek | Stream | | Flathead | 47 59 47 N | 113 28 47 W |
| Nanny Creek | Stream | | Teton | 48 01 07 N | 112 52 31 W |
| Nantelle Post Office (historical) | Post Office | 1073 | Phillips | 47 52 38 N | 108 46 08 W |
| Nantelle Spring | Spring | 1080 | Phillips | 47 53 30 N | 108 46 39 W |
| Naoi Point | Summit | 2221 | Glacier | 48 47 08 N | 113 29 20 W |
| Napa Creek | Stream | | Lake | 47 48 01 N | 113 47 40 W |
| Napa Point | Summit | 1951 | Lake | 47 47 11 N | 113 44 06 W |
| Napi Rock | Pillar | 2278 | Glacier | 48 44 51 N | 113 29 25 W |
| Napoleon Gulch | Valley | | Sanders | 48 06 46 N | 115 50 56 W |
| Narcissus Dam | Dam | 883 | Hill | 48 29 42 N | 110 19 57 W |
| Narrow Gauge Gulch | Valley | | Cascade | 46 55 13 N | 110 43 14 W |
| Narrows Creek | Stream | | Beaverhead | 44 40 14 N | 111 37 48 W |
| Nary Time Gulch | Valley | | Broadwater | 46 43 18 N | 111 29 25 W |
| Nasen Coulee | Valley | | Cascade | 47 11 35 N | 110 56 19 W |
| Nash Brothers - Peerless Elevator (historical) | Locale | 869 | Daniels | 48 46 58 N | 105 49 54 W |
| Nash Brothers Incorporated Feed and Grain Elevator | Locale | 750 | Daniels | 48 47 37 N | 105 25 14 W |
| Nash Group Mine | Mine | 1944 | Madison | 45 26 27 N | 112 06 30 W |
| Nash Gulch | Valley | | Sweet Grass | 45 54 13 N | 109 54 28 W |
| Nashua | Locale | 629 | Valley | 48 08 01 N | 106 21 29 W |
| Nashua | Populated Place | 629 | Valley | 48 07 56 N | 106 21 23 W |
| Nashua Cemetery | Cemetery | 667 | Valley | 48 08 33 N | 106 22 14 W |
| Nashua Post Office | Post Office | 629 | Valley | 48 07 57 N | 106 21 40 W |
| Nashua Volunteer Fire Department | Building | 629 | Valley | 48 07 56 N | 106 21 29 W |
| Nashville Bowl Ski Trail | Trail | 2365 | Madison | 45 16 51 N | 111 24 24 W |
| Nason School (historical) | School | 1489 | Cascade | 47 10 15 N | 110 51 25 W |
| Nasukoin Mountain | Summit | 2453 | Flathead | 48 47 43 N | 114 34 42 W |
| Nat Woods Crossing (historical) | Locale | 1510 | Beaverhead | 45 18 15 N | 112 33 43 W |
| Natahki Lake | Lake | 2005 | Glacier | 48 49 04 N | 113 40 06 W |
| Natal Post Office (historical) | Post Office | 1524 | Fergus | 46 53 22 N | 109 29 37 W |
| Natal School (historical) | School | 1604 | Fergus | 46 52 54 N | 109 28 12 W |
| Nathan (historical) | Locale | 1366 | Gallatin | 46 06 46 N | 111 08 11 W |
| Nathanael Lutheran Church | Church | 638 | Sheridan | 48 35 30 N | 104 15 10 W |
| National Bison Range | Reserve | 1379 | Sanders | 47 19 30 N | 114 13 33 W |
| National Cemetery Military Reservation (historical) | Military (Historical) | 962 | Big Horn | 45 33 55 N | 107 25 54 W |
| National Extension 79 Mine | Mine | 2310 | Lewis and Clark | 46 27 02 N | 112 12 37 W |
| National Museum of Machinery | Building | 1393 | Madison | 45 41 25 N | 112 16 59 W |
| National School (historical) | School | 711 | Roosevelt | 48 16 30 N | 104 19 37 W |
| Native American Educational Services College | School | 607 | Roosevelt | 48 06 47 N | 105 11 51 W |
| Native American Studies Building | Building | 979 | Missoula | 46 51 38 N | 113 59 20 W |
| Natoas Peak | Summit | 2820 | Glacier | 48 52 29 N | 113 45 47 W |
| Natural Bridge Draw | Valley | | Park | 45 32 50 N | 110 12 40 W |
| Natural Bridge Point of Interest | Locale | 1574 | Sweet Grass | 45 32 52 N | 110 12 20 W |
| Natural Bridge State Park | Park | 1542 | Sweet Grass | 45 32 57 N | 110 12 23 W |
| Natural Corrals | Basin | 1279 | Big Horn | 45 00 49 N | 108 14 46 W |
| Natural Pier Fishing Access Site | Locale | 903 | Mineral | 47 00 54 N | 114 30 23 W |
| Nauharodney Dam | Dam | 1724 | Park | 45 54 60 N | 110 26 27 W |
| Navaho Dam | Dam | 1025 | Carter | 45 41 12 N | 104 36 02 W |
| Navaho Post Office (historical) | Post Office | 742 | Daniels | 48 47 32 N | 105 03 37 W |
| Navaho Reservoir | Reservoir | 1019 | Carter | 45 40 23 N | 104 35 30 W |
| Navajo | Locale | 745 | Daniels | 48 47 34 N | 105 03 37 W |
| Navajo | Populated Place | 742 | Daniels | 48 47 32 N | 105 03 37 W |
| Navajo School (historical) | School | 748 | Daniels | 48 47 35 N | 105 03 40 W |
| Navajo Tarn | Lake | 3273 | Carbon | 45 05 05 N | 109 38 28 W |
| Navy | Populated Place | 1520 | Beaverhead | 45 29 05 N | 112 41 45 W |
| Naya Nuki Peak | Summit | 2880 | Gallatin | 45 53 30 N | 110 57 43 W |
| Nazarene Church (historical) | Church | 604 | Sheridan | 48 25 15 N | 104 32 19 W |
| NE Basin Mine | Mine | 1708 | Jefferson | 46 16 55 N | 112 15 08 W |
| NE Cedar Ridge Mine | Mine | 865 | Rosebud | 46 24 10 N | 107 04 36 W |
| NE NE Section 1 Mine | Mine | 1675 | Granite | 46 18 32 N | 112 39 43 W |
| NE NE Section 11 Mine | Mine | 2106 | Meagher | 46 28 23 N | 110 41 05 W |
| NE NE Section 12 Mine | Mine | 1936 | Judith Basin | 46 58 44 N | 110 28 21 W |
| NE NE Section 13 Mine | Mine | 2060 | Jefferson | 46 21 46 N | 112 09 47 W |
| NE NE Section 13 Mine | Mine | 2273 | Jefferson | 46 22 03 N | 112 17 13 W |
| NE NE Section 14 Mine | Mine | 2245 | Broadwater | 46 22 02 N | 111 41 10 W |
| NE NE Section 15 Mine | Mine | 1674 | Jefferson | 46 16 47 N | 112 12 13 W |
| NE NE Section 16 Mine | Mine | 1548 | Lewis and Clark | 46 32 25 N | 112 06 28 W |
| NE NE Section 17 Mine | Mine | 1615 | Broadwater | 46 06 28 N | 111 44 48 W |
| NE NE Section 18 Mine | Mine | 1652 | Jefferson | 46 27 18 N | 111 53 33 W |
| NE NE Section 19 Mine | Mine | 1778 | Powell | 46 41 58 N | 112 31 03 W |
| NE NE Section 20 Mine | Mine | 1391 | Jefferson | 45 49 38 N | 111 51 58 W |
| NE NE Section 20 Mine | Mine | 1752 | Madison | 45 39 20 N | 112 36 51 W |
| NE NE Section 20 Mine | Mine | 1901 | Madison | 45 28 42 N | 112 06 51 W |
| NE NE Section 20 Mine | Mine | 1674 | Ravalli | 45 33 57 N | 114 20 05 W |
| NE NE Section 21 Mine | Mine | 1587 | Broadwater | 46 10 42 N | 111 43 36 W |
| NE NE Section 21 Mine | Mine | 1408 | Silver Bow | 46 54 57 N | 112 42 53 W |
| NE NE Section 23 Mine | Mine | 2026 | Madison | 45 34 03 N | 111 55 53 W |