All - Architectural style - Queen Anne style
| Luft, Conrad, Sr., House |
| Lukins, F. L., House |
| Lutz, Robert, House |
| Lytle, Joseph, Home |
| Macomber, Calvin T., House |
| MacTavish House |
| Madden, Charles, House |
| Maine State Building |
| Malcolm X-Ella Little Collins House |
| Manatt, William, House |
| Manley, Joseph and Susan, Summer Cottage |
| Manny, Anthony, House |
| Mansuy and Smith Automobile Showroom Building |
| Marabanong |
| Marcyes, Claude O., House |
| Mari-Castle |
| Marshalldale |
| Marsh, E.A. and Rebecca (Johnson), House |
| Marx, Albert and Theresa, House |
| Marzoni House |
| Mathewson-Gerecke House |
| Mauldin-Hall House |
| May, Albert, House |
| Maybury-McPherson House |
| McAra, John, House |
| McColl, Anthony M., House |
| McCulla House |
| McGill, Andrew R., House |
| McHenry, George Austin, House |
| McInteer Villa |
| McKleroy-Wilson-Kirby House |
| McMullin, Maj. James W., House |
| McNally, Andrew, House |
| McNutt-Howard House |
| McPherson Opera House |
| McWaid, Job A. and Rebecca E., House |
| McWhorter, Port and Helen, House |
| Mellen City Hall |
| Merriam, Henry W., House |
| Merritt-Ragan House |
| Michels, John J., House |
| Miller and Herriott House |
| Millhiser-Baker Farm |
| Millsaps-Buie House |
| Mills, Richard W. and Margaret, House |
| Milroy, John, House |
| Milroy State Bank Building |
| Milwaukee Normal School-Milwaukee Girls' Trade and Technical High School |
| Miner, Selden, House |
| Missouri State Penitentiary Warden's House |
| Mitchell-Tappan House |
| Moffat Library |
| Montana Avenue Historic District |
| Montgomery County Jail |
| Moody Mansion |
| Moon, Darius B., House |
| Moore-Cunningham House |
| Moore's Crossing Historic District |
| Moore-Ward Cobblestone House |
| Morgan House |
| Morgan, W. H., House |
| Morris, C. E., House |
| Mossman, Col. Adelbert, House |
| Mound City National Cemetery |
| Mount Morris Bank |
| Mt. Horeb Opera Block |
| Muchnic, H. E., House |
| Muench, Adolf, House |
| Mullett Rowhouses |
| Murphey-Jennings House |
| Murphy, William L. and Sydney V., House |
| Nash, William M., House |
| Neal, W. Scott, House |
| Nichols, Frank Eugene, House |
| Nichols, Harry H., House |
| Nixon, Senator P. E., House |
| Northrup House |
| North Street Fire Station |
| North, Townsend, House |
| Norumbega |
| Norumbega Carriage House |
| Noyes, Charles P., Cottage |
| Nutt, Adam Clarke, Mansion |
| Oakes, Augustus J., House |
| Odd Fellows Hall |
| Oldham Avenue Historic District |
| Old South Mebane Historic District |
| Olive, Ira Webster, House |
| Olson, Erick Lehi and Ingrid Larsen, House |
| Omro Village Hall and Engine House |
| Opdyke, Sylvester, House |
| Oregon Masonic Lodge |
| Osgood, J.C., Firehouse |
| Ott, Albert, House |
| Owen, Dr. Thomas McAdory, House |
| Paddock, Colonel George H., House |
| Parrott, Moses, House |
| Patin House |
| Patterson, Charles, House |
| Payne, William A., House |
Data from United States Park Service and Wikidata
