Montana - Significance region: Local
| Lodge Grass Merchandise Company Store |
| Lodgepole Community Hall |
| Lohman Block |
| Lonesomehurst Cabin |
| Longfellow Grade School |
| Long House |
| Lorraine Apartments |
| Lower Bridger School |
| Lower Rattlesnake Historic District |
| Lower Willow Creek Rural Historic Landscape District |
| Lucy Building |
| Lundwall, Charles, Building |
| Lyman-Neel Residence |
| Maclay Bridge |
| Madison County Fairgrounds |
| Madison Hotel and Cafe |
| Main Street Historic District |
| Main Street Historic District |
| Malmborg School |
| Manley’s General Store |
| Many Glacier Barn and Bunkhouse |
| Many Glacier Campground Camptender's Cabin |
| Marcus, Dr. Carl, House |
| Marcyes, Claude O., House |
| Margaret Block |
| Marsh and Powell Funeral Home |
| Masonic Building |
| Masonic Lodge |
| Masonic Temple |
| Masonic Temple |
| Masonic Temple |
| Matheson, Duncan, House |
| Matt's Place Drive-In |
| Maudlow School |
| May, Albert, House |
| May, Charles, House |
| May, George, House |
| May, Harry, House |
| May, Louis, House |
| McCall, Tracy, House |
| McCarthy-Pederson Farm Historic District |
| McCone Residence |
| McCormick Neighborhood Historic District |
| McCormick's Livery and Feed Stable Sign |
| McCrossin, James, Cabin |
| McFarlane House |
| McGee House |
| McGlauflin House |
| McKinley Elementary School |
| McLaughlin, John, House |
| McMannamy House and Rental Properties |
| McMaster Ranch Historic District |
| McMullen Hall |
| Meadowbrook Stock Farm |
| Merrill Avenue Historic District |
| Metcalf House |
| Methodist Church of Alberton |
| Methodist Episcopal Church |
| Methodist Episcopal Church |
| Methodist Episcopal Church and Parsonage |
| Methodist Episcopal Church of Anaconda |
| Methodist-Episcopal Church of Marysville |
| Methodist Episcopal Church South |
| Miles City Steam Laundry |
| Miles, George M., House |
| Mill House |
| MISCO Grain Elevator |
| Missoula County Courthouse |
| Missoula County Fairgrounds Historic District |
| Missoula Downtown Historic District |
| Missoula Laundry Company |
| Missoula Mercantile |
| Missoula Mercantile Warehouse |
| Missoula Southside Historic District |
| Missouri River Bridge |
| Model Laundry and Apartments |
| Modern Hotel |
| Monarch Depot Historic District |
| Moncure Tipi |
| Montana Aeronautics Commission Operations Historic District |
| Montana National Bank |
| Montana State Fairgrounds Racetrack |
| Montana, Wyoming and Southern Railroad Depot |
| Montgomery Ward |
| Moon-Randolph Ranch |
| Moose Lake Camp Historic District |
| Morelli Bridge |
| Morgan-Case Homestead |
| Morr, Philip and Ella, House |
| Mount Helena Historic District |
| Mrs. Lydia McCaffery's Furnished Rooms |
| Murphy, John T., House |
| Natural Pier Bridge |
| Naylor Brothers Ranch Historic District |
| Neihart School |
| Nelson, Gus, Homestead |
| New Brunswick House, The |
| Newman House |
| Norby House |
| North, Austin, House |
Data from United States Park Service and Wikidata
