Montana - Criteria: C (architecture/engineering)
| Goff House |
| Going-to-the-Sun Road |
| Gordon House |
| Grace Lutheran Church of Barber |
| Graf, Arnold, House |
| Graf Building |
| Graham House |
| Grandchamp House |
| Grand Pacific Hotel |
| Grand Union Hotel |
| Granite Apartments |
| Granite County Jail |
| Granite Park Chalet |
| Granke, Charles, House |
| Grant-Kohrs Ranch National Historic Site |
| Graves Hotel |
| Great Falls Central Business Historic District |
| Great Falls Central High School |
| Great Falls High School Historic District |
| Great Northern Railway Buildings |
| Great Northern Railway Passenger and Freight Depot and Division Office |
| Greenblatt, Samuel, House |
| Gregg-Moses House |
| Greve's Tourist Cabins |
| Griffen House |
| Gunsight Pass Shelter |
| Hale's Filling Station and Grocery |
| Halfway House |
| Hamill Apartments |
| Hamill House |
| Hamilton Town Hall |
| Hammond Arcade |
| Hardy Bridge |
| Harmon, William, House |
| Harrington, Rose, House |
| Harris House |
| Harrison Lake Patrol Cabin |
| Harrison, Waborn (Wabe) and Sarah E., Ranch House |
| Hauser Mansion |
| Haverfield Hospital |
| Havre Residential Historic District |
| Hayward Lodge |
| Headquarters Building and Daily Company Annex |
| Headquarters Historic District |
| Hearst Free Library |
| Heaven's Peak Fire Lookout |
| Hecla House |
| Helena South-Central Historic District |
| Heller Building |
| Hellgate Lodge 383 BPOE |
| Heltne Oil Company |
| Hepburn, John, Place |
| Herzog, J. M., House |
| Hi Bug Historic District |
| Hines House |
| Hodgson House |
| Hoffman, Charles, House |
| Holy Rosary Church Rectory |
| Holy Rosary Hospital |
| Hornet Lookout |
| Hospital |
| Hotel Baxter |
| Hotel Metlen |
| Hough, Raymond, House |
| House at 112 Park Street |
| House at 22 West Lamme |
| House at 301 Eighth Avenue, South |
| House at 324 W. Corcoran |
| House at 618 West Janeaux |
| House at 714 North Tracy |
| House at 805 W. Watson |
| House at 809 W. Watson |
| House at 813 W. Watson |
| House at 818 South Eighth |
| House at 916 Preston Avenue |
| House on Railroad Avenue |
| Houtz House |
| Howe, John G., House |
| Hoyt House |
| Huckleberry Fire Outlook |
| Huntley Bridge |
| Huntoon Residence |
| Huseby, John H,. House |
| Hutchins Bridge |
| Independent Telephone Company Building |
| Ingomar Public School |
| IOOF Hall |
| IOOF Hall and Fromberg Co-operative Mercantile Building |
| IOOF Lodge |
| Ismay Jail |
| Jacobs, Michael, House |
| Jefferson County Courthouse |
| Johnson House |
| Johnson-Lee House |
| Johnston, John S., House |
| Judith River Ranger Station |
| Kalispell-American Laundry |
| Kalispell Flour Mill |
| Keith, Harry C., House |
| Keith, John M., House |
Data from United States Park Service and Wikidata
