New Jersey - Significance region: Local
| Marshalltown Historic District |
| Marshallville Historic District |
| Maskel, Thomas, House |
| Masker House |
| Mauricetown Historic District |
| Mays Landing Historic District |
| Maywood Railroad Station |
| McKinney, David, Mill |
| McLeod-Rice House |
| Meadowburn Farm |
| Meadows, The |
| Mechlins Corner Tavern |
| Mecum, William and Margaret, House |
| Memorial Presbyterian Church |
| Mendham Historic District |
| Mercer Street Friends Center |
| Merchants' and Drovers' Tavern |
| Merriam, Henry W., House |
| Methodist Episcopal Church |
| Methodist Episcopal Church of Hibernia |
| Metlar House |
| Metuchen Borough Hall |
| Meyerhoff, John, House |
| Mickle, Samuel, House |
| Middlebush Village Historic District |
| Middlesex Avenue-Woodwild Park Historic District |
| Middletown Village Historic District |
| Middle Valley Historic District |
| Midland School |
| Mid-Town Historic District |
| Milford Historic District |
| Military Park Commons Historic District |
| Miller-Cory House |
| Miller Farmstead |
| Miller, George A., House |
| Miller-Kingsland House |
| Miller-Rinehard Farmstead |
| Miller Street Historic District |
| Mill Hill Historic District |
| Millington Schoolhouse |
| Mills, Timothy, House |
| Millstone Historic District |
| Millstone Valley Agricultural District |
| Milltown India Rubber Company |
| Millville Historic and Archaeological District |
| Millville's First Bank Building |
| Montclair Art Museum |
| Montclair Railroad Station |
| Montrose Park Historic District |
| Montville Schoolhouse |
| Moorestown Friends School and Meetinghouse |
| Moorestown Historic District |
| Moravian Church |
| Morgan, George Jr., and Sarah, House |
| Morgan, Griffith, House |
| Morris County Courthouse |
| Morris Mansion and Mill |
| Morristown and Erie Railroad Whippany Water Tank |
| Morristown District |
| Morristown School |
| Morton Hotel |
| Morton Memorial Laboratory of Chemistry |
| Mott Hollow |
| Mott, Peter, House |
| Mott School and Second Street School |
| Mountain Avenue Historic District |
| Mountain District |
| Mountain Lakes Historic District |
| Mountainville Historic District |
| Mount Airy Historic District |
| Mount Arlington Historic District |
| Mount Bethel Baptist Meetinghouse |
| Mount Bethel Methodist Church |
| Mount Freedom Presbyterian Church |
| Mount Holly Historic District |
| Mount Hope Miners' Church |
| Mount Kemble Home |
| Mount Olive Village Historic District |
| Mount Pleasant Cemetery |
| Mount Pleasant Historic District |
| Mount Pleasant School |
| Mount Rose Distillery |
| Mount Salem Methodist Episcopal Church |
| Mount Tabor Historic District |
| Mount Vernon School |
| Mount Zion African Methodist Episcopal (AME) Church |
| Mount Zion African Methodist Episcopal Church and Mount Zion Cemetery |
| Mulford House |
| Mullica Hill Historic District |
| Mulligan, M. C., & Sons Quarry |
| Murphy Varnish Works |
| Music Hall |
| Mutual Benefit Life Insurance Company |
| Myers-Masker House |
| Nagle, John, House |
| National State Bank |
| Naugle, Henry, House |
| Naugle House |
| Naugle, Isaac, House |
| Navesink Historic District |
Data from United States Park Service and Wikidata
