All - Constructed - 1890–1899
| Martyrs Monument in Midway |
| Marzoni House |
| Masonic Block |
| Masonic Temple |
| Maxwell, Louis N., House |
| May, Albert, House |
| Maynard, Charles, House |
| McCormick Harvesting Machine Company Building |
| McCormick-International Harvester Company Branch House |
| McCoy-Maddox House |
| McDowell County Courthouse |
| McDowell Memorial Presbyterian Church |
| McGurk Cabin |
| McHenry, George Austin, House |
| McInteer Villa |
| McIntyre House |
| McLean, Isaac, House |
| McLeod-Rice House |
| McPherson County Courthouse |
| Mechem, Floyd R., House |
| Medford Pipe Bridge |
| Meeker I.O.O.F. Lodge-Valentine Lodge No. 47 |
| Meems Bottom Covered Bridge |
| Melcher Bridge |
| Mellen City Hall |
| Memorial Hall |
| Memphis & Charleston Railroad Bridge |
| Menard-Galaz House |
| Mercer County Courthouse |
| Mercersburg Academy |
| Merchants National Bank |
| Meriden Curtain Fixture Company Factory |
| Merion Golf Club, East and West Courses |
| Merrihew, Harry B., Drugstore |
| Merryall Union Evangelical Society Chapel |
| Messenger of Peace Chapel Car |
| Methodist Episcopal Church |
| Methodist Episcopal Church of Pescadero |
| Methuen Memorial Music Hall |
| Mexican Canyon Trestle |
| Mexican Consulate |
| Miami County Courthouse |
| Michigan Millers Mutual Fire Insurance Company Building |
| Michigan Trust Company Building |
| Mickle, Willis, House |
| Middlesex Fells Reservation Parkways |
| Middleton Depot, Chicago, Milwaukee, and St. Paul Railroad |
| Midland Hotel |
| Miller Block |
| Miller Hotel |
| Millhiser-Baker Farm |
| Millington Bank Building |
| Mills Building and Tower |
| Mills, Job, Block |
| Mills, Richard W. and Margaret, House |
| Milwaukee City Hall |
| Milwaukee Falls Lime Company |
| Milwaukee Road Passenger Depot |
| Mimbres School |
| Miner, Selden, House |
| Minneapolis Brewing Company |
| Minor Chapel A. M. E. Church |
| Mintzer House |
| Miramont |
| Mississippi Valley Trust Company Building |
| Mitchell-Tappan House |
| Mizpah Presbytarian Church of East Portland |
| Moab Cabin |
| Mohawk Valley Grange Hall |
| Monadnock Block |
| Monroe County Courthouse |
| Monroe County Courthouse |
| Monte Vista and Diamond Mountain Vineyard |
| Montgomery Union Station and Trainshed |
| Montvale Block |
| Moody Mansion |
| Moody Street Fire Station |
| Moon, Darius B., House |
| Moonlight Towers |
| Moore-Settle House |
| Moravian Pottery and Tile Works |
| Moriarty Eclipse Windmill |
| Morningside College Historic District |
| Morris, C. E., House |
| Morris, Joseph Henry, House |
| Morrison County Courthouse |
| Morristown School |
| Morse and Wade Building |
| Moss, A. B., Building |
| Mossman, Col. Adelbert, House |
| Mother Bethel A.M.E. Church |
| Mountain Iron Mine |
| Mount Lowe Railway |
| Mount Zion A.M.E. Church |
| Mt. Horeb Opera Block |
| Mt. Pleasant Methodist Church |
| Mt. Pleasant School |
| Mt. Zion AME Zion Church |
| Muddy Waters House |
| Municipal Building |
Data from United States Park Service and Wikidata
