All - Architectural style - Beaux-Arts
| Mainstreet Theatre |
| Mann, George R., Building |
| Marble House |
| Marion County Courthouse and Sheriff's House |
| Marquette County Courthouse and Marquette County Sheriff's Office and Jail |
| Marshall, Thomas R., School |
| Martin County Courthouse |
| Martin, T.S., and Company |
| Masonic Lodge |
| Masonic Temple |
| Masonic Temple |
| Masonic Temple |
| Masonic Temple-Hoquiam |
| Masonic Temple of Des Moines |
| Mayflower Hotel |
| McBride, William Cullen, Catholic High School |
| McCormick Apartments |
| McHenry County Courthouse |
| McIntosh County Courthouse |
| McLeod County Courthouse |
| Medical Arts Building |
| Memorial Building |
| Memorial Gymnasium |
| Memorial Hall |
| Memphis Merchants Exchange |
| Mercer County Court House |
| Metuchen Borough Hall |
| Miami County Courthouse and Power Station |
| Michaels-Stern Building |
| Middough Brothers-Insurance Exchange Building |
| Minnesota State Capitol |
| Mississippi State Capitol |
| Mississippi Valley Trust Company Building |
| Monroe Carnegie Library |
| Monroe County Courthouse |
| Monticello Arcade |
| Morehouse Parish Courthouse |
| Morgan Building |
| Morton Building |
| Morton, J. Sterling, High School East Auditorium |
| Municipal Building |
| Municipal Building |
| Municipal Building |
| Municipal Building |
| Municipal Courts Building |
| Municipal Ferry Pier |
| Muscatine County Courthouse |
| National Bank of San Mateo |
| National Bank of Whittier Building |
| National Metropolitan Bank Building |
| National State Bank Building |
| Navarro County Courthouse |
| New Amsterdam Theater |
| Newark City Hall |
| Newburger, Joseph, House |
| New England Building |
| Newhall Estate |
| New Hampshire Bank Building |
| New Haven Jewish Home for the Aged |
| New Pump-House |
| New Theatre |
| New York Public Library |
| New York State Department of Education Building |
| Niagara Falls City Hall |
| Northwestern National Bank Building |
| Northwestern National Life Insurance Company Home Office |
| Oakland City Hall |
| O'Brien County Courthouse |
| Ocean City City Hall |
| Old Central High School |
| Old Clay County Courthouse |
| Old DeKalb County Courthouse |
| Old Federal Building and Post Office |
| Old Hamilton Library |
| Old Lawrence City Library |
| Old Petaluma Opera House |
| Old Post Office |
| Old Town Hall |
| Old Vermilion Banking Company Building |
| Olean Public Library |
| Orchestra Hall |
| Orpheum Theater |
| Orpheum Theatre |
| Otoe County Courthouse |
| Otter Tail County Courthouse |
| Our Lady of Mount Carmel and St. Therese Church |
| Pacific County Courthouse |
| Pacific Electric Building |
| Pacific Gas and Electric Company General Office Building and Annex |
| Palace of Fine Arts |
| Palestine Lodge |
| Palms, Francis, Building & State Theater |
| Pampa City Hall |
| Park View Hotel |
| Paterson City Hall |
| Paulding County Carnegie Library |
| Pawtucket Post Office |
| Payne Avenue State Bank |
| Pembina County Courthouse |
| Penn Central Station |
Data from United States Park Service and Wikidata
