California - Criteria: A (event)
| Malaguerra Winery |
| Malakoff Diggins-North Bloomfield Historic District |
| Malibu Historic District |
| Manchester Schoolhouse |
| Mansion House Hotel |
| Manzanar War Relocation Center, National Historic Site |
| Manzanita Lake Naturalist's Services Historic District |
| Marconi-RCA Bolinas Transmitting Station |
| Mare Island Naval Shipyard |
| Marine Corps Recruit Depot Historic District |
| Marinship Machine Shop |
| Mariposa County Courthouse |
| Mariposa Grove Museum |
| Marsh, John, House |
| Martin Building |
| Martinez Downtown Post Office |
| Marysville Historic Commercial District |
| Masonic Temple |
| Masonic Temple and Lodge |
| Masonic Temple-Naval Lodge No. 87, Free and Accepted Masons |
| Masson, Paul, Mountain Winery |
| Matson Building and Annex |
| Maxfield Building |
| Maydestone Apartments |
| Mayfair Hotel |
| May Lake High Sierra Camp |
| Maywood Woman's Club |
| McCauley and Meyer Barns |
| McClatchy, C.K., Senior High School |
| McClintock Storage Warehouse |
| McCloud |
| McDonald, D. C., Building |
| McFarlan, George, House |
| McGurk Cabin |
| McKinley Park |
| McMullen, John, House |
| McNear, Erskine, B., House |
| Memorial Branch |
| Mendocino and Headlands Historic District |
| Mendocino Woodlands Recreational Demonstration Area |
| Menlo Avenue-West Twenty-ninth Street Historic District |
| Menlo Park Railroad Station |
| Merced County High School |
| Merced Lake High Sierra Camp |
| Merced Lake Ranger Station |
| Merced Theatre |
| Merritt, Josiah, Adobe |
| Merrium Apartments |
| Messina Orchard |
| Methodist Episcopal Church at Half Moon Bay |
| Methodist Episcopal Church of Pescadero |
| Middough Brothers-Insurance Exchange Building |
| Milano Hotel |
| Mill Creek Zanja |
| Miller-Melone Ranch |
| Miller Red Barn |
| Million Dollar Theater |
| Mills Hall |
| Milpitas Grammar School |
| Mineral King Road Cultural Landscape |
| Minerva Club of Santa Maria |
| Mission Beach Roller Coaster |
| Mission Brewery |
| Mission Dolores |
| Mission San Buenaventura and Mission Compound Site |
| Mission San Fernando Rey de Convento Building |
| Mission San Jose |
| Mission San Juan Capistrano |
| Mission Santa Ines |
| Modjeska House |
| Mohr and Yoerk Market |
| Moir Building |
| Molino Lodge Building |
| Monday Club of San Luis Obispo |
| Moneta Branch |
| Mono County Courthouse |
| Montebello Woman's Club |
| Montecito Ranch House |
| Monterey Old Town Historic District |
| Monte Vista and Diamond Mountain Vineyard |
| Moro Rock Stairway |
| Morro Bay State Park Trailer and Tent Campground |
| Morse, Charles Copeland, House |
| Mountain View Adobe |
| Mount Harkness Fire Lookout |
| Mount Lowe Railway |
| Mount Pleasant House |
| Mount San Jacinto State Park Historic District |
| Mount St. Mary's Academy and Convent |
| Mount Tamalpais Mountain Theater |
| Mount View Hotel |
| Moyse Building |
| Muir, John, Branch |
| Muir, John, Memorial Shelter |
| Muir Woods National Monument |
| Municipal Warehouse No. 1 |
| Murphys Grammar School |
| Murphys Hotel |
| Napa County Courthouse Plaza |
| Napa Opera House |
Data from United States Park Service and Wikidata
