Pennsylvania - Role: Building
| Milton Armory |
| Milton Freight Station |
| Mishler Theatre |
| Mitchell, James, House |
| Mitchell-Shook House |
| Mitchell, S. Weir, School |
| Mixsell, Jacob, House |
| Modern Tool Company |
| Moland House |
| Monastery, The |
| Monroe County Courthouse |
| Monroe Tavern |
| Monte Vista |
| Montgomery, Gen. William, House |
| Montgomery House |
| Montgomery Ward Building |
| Montgomery, William, House |
| Moore, Capt. Thomas, House |
| Moore, Clarence B., House |
| Moore Hall |
| Mooresburg School |
| Moravian Pottery and Tile Works |
| Moravian Sun Inn |
| Moreland-Hoffstot House |
| Morgan, Edward, Log House |
| Morris, Anthony, House |
| Morris-Hair Tavern |
| Morrison, Andrew J., School |
| Morrow, John, Elementary School |
| Morse, Samuel F. B., School |
| Morton Homestead |
| Morton, Morton, House |
| Mortonville Hotel |
| Moselem Farms Mill |
| Mosier, Dr. J. R., Office |
| Most Precious Blood Roman Catholic Church, Rectory and Parochial School |
| Mother Bethel A.M.E. Church |
| Mountain Meadow Farm |
| Mountain Springs Hotel |
| Mount Hope Estate |
| Mount Joy |
| Mount Pleasant |
| Mount Pleasant Armory |
| Mount St. Peter Roman Catholic Church |
| Mount Tabor AME Zion Church and Cemetery |
| Mount Zion A.M.E. Church |
| Moyer, John Nicholas and Elizabeth, House |
| Mt. Airy Station |
| Mt. Pleasant Iron Works House |
| Muhlenberg, Henry Melchoir, House |
| Muhlenberg School |
| Muhr, Simon, Work Training School |
| Mulford Building |
| Mulford, Sylvanus, House |
| Mumma, Samuel N., Tobacco Warehouse |
| Munce, Thomas, House |
| Municipal Building and Central Fire Station, 340 |
| Murray, Thomas, House |
| Musical Fund Hall |
| Nace (Neas), George, House |
| Nakashima, George, Woodworker Complex |
| Nathan's Department Store |
| National Bank of Coatesville Building |
| National Bank of North Philadelphia |
| National Transit Building |
| Nazareth Hall Tract |
| Nearpass House |
| Nebinger, George W., School |
| Neff, Maj. John, Homestead |
| Neff Round Barn |
| Neill-Mauran House |
| Nelson, John H., House |
| Nesbit-Walker Farm |
| Nesquehoning High School |
| Neuweiler Brewery |
| Neville House |
| New Berlin Presbyterian Church |
| New Castle Armory |
| New Castle Hospital |
| New Century Clubhouse |
| New Century Guild |
| New Colonial Hotel |
| New Enterprise Public School |
| New Era Building |
| New Freedom Railroad Station, Northern Central Railway |
| New Granada Theater |
| New Holland Machine Company |
| Newlin Miller's House |
| Newlin, Nicholas, House |
| New Market |
| New Ringgold Gristmill |
| New Thomson House |
| Newtown Friends Meetinghouse and Cemetery |
| New York Mutual Life Insurance Company Building |
| Nicholas, Jacob, House |
| Nichols, Jeremiah, School |
| Nicholson House and Inn |
| Nineteenth Street Theater |
| Nissly-Stauffer Tobacco Warehouses |
| Nissly Swiss Chocolate Company |
Data from United States Park Service and Wikidata
