Massachusetts - Area of significance: Architecture
| Plymouth Post Office Building |
| Plymouth Rock |
| Plymouth Village Historic District |
| Plympton Village Historic District |
| Pocasset Firehouse No. 7 |
| Point Neighborhood Historic District |
| Poli's Palace Theater |
| Pomeroy Terrace Historic District |
| Pond Hill School |
| Pond Street School |
| Poor House and Methodist Cemetery |
| Porcellian Club |
| Porter-Phelps-Huntington House |
| PORTLAND (Shipwreck and Remains) |
| Port Royal House |
| Potter Estate |
| Potter-O'Brian House |
| Powder House Park |
| Power, Charles Whittlesey, House |
| Powers Institute Historic District |
| Pratt, Capt. Josiah, House |
| Pratt, Dexter, House |
| Pratt-Faxon House |
| Pratt Historic Building |
| Pratt House |
| Pratt, Miles, House |
| Pratt, Stillman, House |
| Prentiss, Addison, House |
| Prentiss-Payson House |
| Prentiss, William, House |
| Prescott Estate |
| Prescott, Gustavus G., House |
| Prescott Town House |
| Pressey-Eustis House |
| Primrose Street Schoolhouse |
| Princeton Center Historic District |
| Printers Building, The |
| Proctor, John, House |
| Proctor, John, House |
| Proctor, William, House |
| Prospect Congregational Church |
| Prospect-Gaylord Historic District |
| Prospect Heights Historic District |
| Prospect Hill School |
| Prospect House |
| Providence Court |
| Providence Street Firehouse |
| Providence Street Historic District |
| Provincetown Historic District |
| Provincetown Public Library |
| Provost, Arthur, Three-Decker |
| Publicity Building |
| Punchard, Benjamin House |
| Purchase-Ferre House |
| Puritan House |
| Putnam, Deacon Edward, Jr., House |
| Putnam, Gen. Israel, House |
| Putnam, James, Jr., House |
| Putnam, Otis, House |
| Putnam, Rev. Daniel, House |
| Putnam Street Historic District |
| Qheguechan Club |
| Quadrangle-Mattoon Street Historic District |
| Quaker Meetinghouse |
| Queguechan Valley Mills Historic District |
| Quincy Grammar School |
| Quincy Homestead |
| Quincy, Josiah, House |
| Quincy, Josiah, House |
| Quincy Market |
| Quincy Point Fire Station |
| Quincy Police Station |
| Quincy Savings Bank |
| Quincy School |
| Quincy Town Hall |
| Quinsigamond Branch Library |
| Quinsigamond Firehouse |
| Rabbit Hill Historic District |
| Race Point Light Station |
| Radding Building |
| Railroad Hotel |
| Railway Village Historic District |
| Ramsdell Public Library |
| Randall-Hale Homestead |
| Rawson Estate |
| Rawson, Warren, Building |
| Rawson, Warren, House |
| Raymond, Tilley, House |
| Read, Cheney, House |
| Reading Municipal Building |
| Reading Municipal Light and Power Station |
| Reading Standpipe |
| Read, Nathan, House |
| Rea-Proctor Homestead |
| Reardon, Edmund, House |
| Record, Jonathan Dexter, House |
| Redman Farm House |
| Reed and Barton Complex |
| Reed, Frank, Three-Decker |
| Reed, H.R., House |
Data from United States Park Service and Wikidata
