Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| First Church of Christ Scientist | Church | 907 | Flathead | 48 12 20 N | 114 19 28 W |
| First Church of Christ Scientist | Church | 1476 | Gallatin | 45 40 28 N | 111 02 51 W |
| First Church of Christ Scientist | Church | 1275 | Lewis and Clark | 46 35 01 N | 112 00 31 W |
| First Church of Christ Scientist | Church | 974 | Missoula | 46 50 20 N | 114 00 13 W |
| First Church of Christ Scientist | Church | 1088 | Ravalli | 46 14 40 N | 114 09 43 W |
| First Church of Christ Scientist | Church | 1769 | Silver Bow | 46 00 54 N | 112 32 24 W |
| First Church of God | Church | 796 | Lincoln | 48 52 55 N | 115 03 04 W |
| First Church of Nazarene | Church | 1476 | Gallatin | 45 40 32 N | 111 03 47 W |
| First Church of the Nazarene | Church | 1033 | Cascade | 47 30 11 N | 111 16 37 W |
| First Church of the Nazarene | Church | 921 | Flathead | 48 14 50 N | 114 18 33 W |
| First Church of the Nazarene | Church | 772 | Hill | 48 31 54 N | 109 40 54 W |
| First Church of the Nazarene | Church | 966 | Missoula | 46 50 57 N | 114 02 23 W |
| First Church of the Nazarene | Church | 1670 | Silver Bow | 45 59 44 N | 112 30 42 W |
| First Congregational Church | Church | 887 | Big Horn | 45 43 50 N | 107 36 59 W |
| First Congregational Church | Church | 605 | Richland | 47 27 13 N | 104 20 32 W |
| First Congregational Church of Intake | Church | 629 | Dawson | 47 17 14 N | 104 31 43 W |
| First Congregational Church United Church of Christ | Church | 639 | Valley | 48 11 54 N | 106 38 12 W |
| First Congregational United Church of Christ | Church | 1063 | Cascade | 47 29 42 N | 111 15 23 W |
| First Congregational United Church of Christ | Church | 631 | Dawson | 47 06 12 N | 104 42 57 W |
| First Congregational United Church of Christ | Church | 625 | Sheridan | 48 46 36 N | 104 33 24 W |
| First Coulee | Valley | | Valley | 48 54 35 N | 106 51 11 W |
| First Creek | Stream | | Big Horn | 45 06 37 N | 106 28 09 W |
| First Creek | Stream | | Custer | 45 58 05 N | 105 09 30 W |
| First Creek | Stream | | Custer | 46 10 38 N | 105 35 41 W |
| First Creek | Stream | | Custer | 46 14 07 N | 105 17 40 W |
| First Creek | Stream | | Gallatin | 45 12 53 N | 111 12 43 W |
| First Creek | Stream | | Garfield | 47 21 56 N | 106 35 00 W |
| First Creek | Stream | | Madison | 45 38 43 N | 112 21 54 W |
| First Creek | Stream | | Mineral | 47 07 44 N | 114 47 06 W |
| First Creek | Stream | | Missoula | 47 10 41 N | 113 40 27 W |
| First Creek | Stream | | Phillips | 47 52 14 N | 107 45 04 W |
| First Creek | Stream | | Powder River | 45 19 44 N | 105 31 34 W |
| First Creek | Stream | | Powder River | 45 17 58 N | 106 08 58 W |
| First Creek | Stream | | Richland | 48 03 34 N | 105 05 46 W |
| First Creek | Stream | | Valley | 48 25 05 N | 107 16 38 W |
| First Creek (historical) | Populated Place | 790 | Phillips | 47 52 23 N | 107 52 40 W |
| First Creek Community Center | Locale | 801 | Phillips | 47 52 15 N | 107 51 20 W |
| First Creek Post Office (historical) | Post Office | 790 | Phillips | 47 52 23 N | 107 52 40 W |
| First Creek Reservoir | Reservoir | 726 | Phillips | 47 52 35 N | 107 46 35 W |
| First Creek Reservoir | Reservoir | 1331 | Phillips | 45 52 42 N | 109 46 51 W |
| First Creek Spring | Spring | 1213 | Powder River | 45 19 25 N | 106 13 17 W |
| First Crow Indian Baptist Church | Church | 1027 | Big Horn | 45 18 52 N | 107 21 47 W |
| First English Lutheran Church | Church | 1019 | Cascade | 47 30 25 N | 111 17 39 W |
| First English Lutheran Church | Church | 602 | Roosevelt | 48 08 24 N | 104 13 22 W |
| First English Lutheran Church (historical) | Church | 1065 | Fergus | 47 19 53 N | 108 57 36 W |
| First Evangelical Church | Church | 1022 | Missoula | 46 49 15 N | 114 02 35 W |
| First Evangelical Lutheran Church | Church | 1553 | Beaverhead | 45 12 58 N | 112 38 02 W |
| First Golden Valley Baptist Church | Church | 1113 | Golden Valley | 46 17 50 N | 109 15 32 W |
| First Gulch | Valley | | Lewis and Clark | 47 02 12 N | 112 26 39 W |
| First Gully Ski Trail | Trail | 2365 | Madison | 45 16 51 N | 111 24 24 W |
| First Hay Creek | Stream | | Richland | 47 48 06 N | 104 04 11 W |
| First Lake | Lake | 1925 | Lake | 47 23 39 N | 113 53 28 W |
| First Lutheran Church | Church | 805 | Chouteau | 47 49 05 N | 110 40 30 W |
| First Lutheran Church | Church | 726 | Custer | 46 24 11 N | 105 49 47 W |
| First Lutheran Church | Church | 1473 | Gallatin | 45 40 32 N | 111 02 08 W |
| First Lutheran Church | Church | 1264 | Lewis and Clark | 46 35 02 N | 112 00 05 W |
| First Lutheran Church | Church | 747 | McCone | 47 24 55 N | 105 35 29 W |
| First Lutheran Church | Church | 977 | Missoula | 46 51 40 N | 113 59 49 W |
| First Lutheran Church | Church | 909 | Petroleum | 47 00 26 N | 108 21 18 W |
| First Lutheran Church | Church | 728 | Richland | 47 40 57 N | 104 37 23 W |
| First Lutheran Church | Church | 633 | Roosevelt | 48 06 00 N | 105 38 38 W |
| First Lutheran Church | Church | 752 | Sanders | 47 27 26 N | 114 53 18 W |
| First Lutheran Church | Church | 604 | Sheridan | 48 25 20 N | 104 32 13 W |
| First Lutheran Church | Church | 639 | Valley | 48 11 53 N | 106 38 12 W |
| First Lutheran Church | Church | 994 | Valley | 48 51 32 N | 106 24 31 W |
| First Lutheran Church (historical) | Church | 1017 | Fallon | 46 11 38 N | 104 22 12 W |
| First Lutheran Church of Savage | Church | 607 | Richland | 47 27 05 N | 104 20 39 W |
| First Lutheran Church of Westby (historical) | Church | 641 | Sheridan | 48 52 13 N | 104 03 07 W |
| First Presbyterian Church | Church | 1554 | Beaverhead | 45 12 55 N | 112 38 06 W |
| First Presbyterian Church | Church | 1027 | Cascade | 47 30 20 N | 111 17 03 W |
| First Presbyterian Church | Church | 722 | Custer | 46 24 30 N | 105 50 35 W |
| First Presbyterian Church | Church | 1609 | Deer Lodge | 46 07 40 N | 112 57 11 W |
| First Presbyterian Church | Church | 1200 | Fergus | 47 03 49 N | 109 25 39 W |
| First Presbyterian Church | Church | 900 | Flathead | 48 11 35 N | 114 18 43 W |
| First Presbyterian Church | Church | 922 | Flathead | 48 24 35 N | 114 20 10 W |
| First Presbyterian Church | Church | 1469 | Gallatin | 45 40 43 N | 111 02 14 W |
| First Presbyterian Church | Church | 1150 | Glacier | 48 37 60 N | 112 20 06 W |
| First Presbyterian Church | Church | 762 | Hill | 48 32 48 N | 109 40 39 W |
| First Presbyterian Church | Church | 1308 | Judith Basin | 47 09 04 N | 110 13 14 W |
| First Presbyterian Church | Church | 892 | Lake | 47 41 34 N | 114 09 31 W |
| First Presbyterian Church | Church | 1264 | Lewis and Clark | 46 35 14 N | 112 02 05 W |
| First Presbyterian Church | Church | 636 | Lincoln | 48 23 32 N | 115 34 04 W |
| First Presbyterian Church | Church | 1552 | Meagher | 46 32 38 N | 110 54 05 W |
| First Presbyterian Church | Church | 977 | Missoula | 46 51 53 N | 113 59 58 W |
| First Presbyterian Church | Church | 1074 | Pondera | 48 10 13 N | 111 56 58 W |
| First Presbyterian Church | Church | 1387 | Powell | 46 23 51 N | 112 43 54 W |
| First Presbyterian Church | Church | 1087 | Ravalli | 46 14 48 N | 114 10 21 W |
| First Presbyterian Church | Church | 583 | Richland | 47 47 29 N | 104 05 09 W |
| First Presbyterian Church | Church | 609 | Roosevelt | 48 05 18 N | 105 38 34 W |
| First Presbyterian Church | Church | 605 | Roosevelt | 48 06 36 N | 105 11 56 W |
| First Presbyterian Church | Church | 869 | Sanders | 47 36 21 N | 114 40 13 W |
| First Presbyterian Church | Church | 1709 | Silver Bow | 46 00 27 N | 112 33 00 W |
| First Presbyterian Church (historical) | Church | 721 | Blaine | 48 31 60 N | 108 47 03 W |
| First Presbyterian Church (historical) | Church | 1609 | Granite | 46 20 02 N | 113 17 45 W |
| First Reformed Church | Church | 1072 | Pondera | 48 10 13 N | 111 56 46 W |
| First Rock Lake | Lake | 2693 | Carbon | 45 05 12 N | 109 32 49 W |
| First Run Ski Trail | Trail | 1810 | Missoula | 47 01 25 N | 113 59 50 W |
| First Shot Mine | Mine | 2487 | Jefferson | 46 21 29 N | 112 16 12 W |
| First Southern Baptist Church | Church | 1064 | Cascade | 47 29 45 N | 111 15 22 W |
| First Spring | Spring | 1039 | Powder River | 45 22 25 N | 106 12 22 W |
| First Street Ski Trail | Trail | 2528 | Carbon | 45 11 15 N | 109 21 03 W |
| First United Methodist Church | Church | 1018 | Cascade | 47 30 26 N | 111 17 48 W |
| First United Methodist Church | Church | 723 | Custer | 46 24 31 N | 105 50 36 W |
| First United Methodist Church | Church | 637 | Lincoln | 48 23 23 N | 115 33 20 W |
| First United Methodist Church | Church | 978 | Missoula | 46 52 14 N | 113 59 28 W |
| First United Methodist Church | Church | 639 | Valley | 48 11 48 N | 106 38 06 W |
| First Wolverine Creek | Stream | | Beaverhead | 44 40 52 N | 112 09 54 W |
| First Yellow Mule Creek | Stream | | Gallatin | 45 14 17 N | 111 20 55 W |
| Fischer Park | Populated Place | 588 | Richland | 47 43 00 N | 104 08 42 W |
| Fish Camp | Locale | 581 | Roosevelt | 48 08 37 N | 104 36 48 W |