All - Architectural style - Federal architecture
| Miller, Robert H., House |
| Miller, Samuel, House |
| Miller's Tavern |
| Miller, Stephen, House |
| Mill Hill |
| Mill Prong |
| Mills, Davis, House |
| Mills, Gen. William A., House |
| Minor, J. R., House |
| Minott, William, House |
| Mirador |
| Mistletoe |
| Mitchell House |
| Mitchell, James, House |
| Mitchell, Joseph, House |
| Mitchell, Randolph, House |
| Mitchell-Shook House |
| Mitchell-Ward House |
| Mitchell, William, House |
| Mixsell, Jacob, House |
| Monmouth |
| Monroe, Bessie, House |
| Mont Calm |
| Monteith,Thomas and Walter,House |
| Monte Verde |
| Montezuma |
| Montgomery House |
| Montgomery, William, House |
| Montpier |
| Montrose |
| Montz, Dr. Lucy Dupuy, House |
| Moody Farm |
| Moon-Dominick House |
| Mooney, Edward, House |
| Mooney, Washington, House |
| Moore/Carlew Building |
| Moore, Edward and Ann, House |
| Moorefields |
| Moore House |
| Moore, John, House |
| Moore Jr., William, House |
| Moore-Manning House |
| Moore-McMillen House |
| Moor Green |
| Moran, Ben, House |
| Morehead, Gov. Charles S., House |
| Morgan, Col. Gideon, House |
| Morgan Hook and Ladder Company |
| Morgan House |
| Morgan-Hueston House |
| Morgan, Joseph, House |
| Morgan, Ralph, Stone House |
| Moross House |
| Morris County Courthouse |
| Morris-Lull Farm |
| Morrison, Alfred W., House |
| Morris, Richard Vaughen, House |
| Morse, Amos, House |
| Morse-Barber House |
| Morse, Eli, Farm |
| Morse-Tay-Leland-Hawes House |
| Mortonville Hotel |
| Morven |
| Morven |
| Mory's |
| Mosby Tavern |
| Mosgrove, Dr. Adam, House |
| Moss, Horace O., House |
| Mound House |
| Mountain Shoals Plantation |
| Mountain View |
| Mount Air |
| Mount Airy |
| Mount Airy |
| Mount Hope Estate |
| Mount Ida |
| Mount Mourne |
| Mount Pleasant |
| Mount Pleasant |
| Mount Salem Baptist Meetinghouse |
| Mowfield |
| Mowry, Tyler, House |
| Mowry, William, House |
| Mt. Airy |
| Mt. Bleak-Skye Farm (030-0283) |
| Mt. Gilead Baptist Church |
| Mt. Hygeia |
| Mt. Pleasant |
| Mt. Zion Methodist Church |
| Much Haddam |
| Mulberry Grove |
| Mulberry Hill |
| Mulberry Plantation (Chesnut House) |
| Muldor-Miller House |
| Mulhern House |
| Mumford, Lewis, House |
| Mumma, Jacob H. W., House |
| Munch, Daniel, House |
| Murrell Home |
| Myers House |
Data from United States Park Service and Wikidata
