Pennsylvania - Criteria: C (architecture/engineering)
| Patton Historic District |
| Pawling, Isaac, House |
| Paxson, Isaiah, Farm |
| Payne's Folly |
| Peace Church |
| Peirce, William S., School |
| Pemberton, Phineas, House |
| Penn Alto Hotel |
| Pennell, Joseph, School |
| Pennock, Martha, House |
| Pennsalt Historic District |
| Penn's Cave and Hotel |
| Penn's Park General Store Complex |
| Penns Park Historic District |
| Pennsylvania Academy of the Fine Arts |
| Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch |
| Pennsylvania Furnace Mansion |
| Pennsylvania Hall, Gettysburg College |
| Pennsylvania Institute for the Deaf and Dumb |
| Pennsylvania Railroad Bridge |
| Pennsylvania Railroad Bridge over Shavers Creek |
| Pennsylvania Railroad District |
| Pennsylvania Railroad Freight Building |
| Pennsylvania Railroad Office Building |
| Pennsylvania Railroad Old Bridge over Standing Stone Creek |
| Pennsylvania Railroad Passenger Station |
| Pennsylvania Railroad Station at Wayne |
| Pennsylvania Railroad Station-Latrobe |
| Pennsylvania Railroad Station-Wilkinsburg |
| Pennsylvania State Lunatic Hospital |
| Pennsylvania State Office Building |
| Penn Treaty Junior High School |
| Pennypacker, Benjamin, House |
| Pennypacker, Matthias, Farm |
| Pennypacker, Samuel W., School |
| Perikomen Bridge Hotel |
| Perkiomen Bridge |
| Perry County Courthouse |
| Perry High School |
| Petersburg Tollhouse |
| Peters-Graham House |
| Peters House |
| Peters, William, House |
| Pettit's Ford |
| Philadelphia City Hall |
| Philadelphia College of Art |
| Philadelphia Contributionship |
| Philadelphia Naval Shipyard Historic District |
| Philadelphia Quartermaster Depot |
| Philadelphia Racquet Club |
| Philadelphia Savings Fund Society Building |
| Philadelphia School of Occupational Therapy |
| Philadelphia Stock Exchange |
| Philadelphia Wholesales Drug Company Building |
| Philadelphia, Wilmington and Baltimore Railroad Freight Shed |
| Philipsburg Historic District |
| Phillips, Joseph and Esther, Plantation |
| Phillips Mill Historic District |
| Phipps Conservatory |
| Phipps-McElveen Building |
| Phoenixville Historic District |
| Physicians and Dentists Building |
| Pickle, Simon, Stone House |
| Pickwick |
| Pierce, Jonas J., House |
| Pierce, Lukens, House |
| Pike County Courthouse |
| Pine Forge Mansion and Industrial Site |
| Pine Grove Covered Bridge |
| Pine Grove Furnace |
| Pine Grove Historic District |
| Pinehurst Apartments |
| Pinetown Covered Bridge |
| Pine Valley Covered Bridge |
| Pitcairn Building |
| Pithole Stone Arch |
| Pittsburgh and Lake Erie Passenger Station, Aliquippa |
| Pittsburgh and Lake Erie Railroad Complex |
| Pittsburgh Athletic Association Building |
| Pittsburgh & Lake Erie Railroad Station |
| Pittsburgh Renaissance Historic District |
| Pittsburgh Terminal Warehouse and Transfer Company |
| Plays and Players |
| Plaza Apartments |
| Pleasant Hill Plantation |
| Pleasantville Bridge |
| Pleasureville Historic Historic |
| Plymouth Meeting Historic District |
| Pocono Manor Historic District |
| Poe, Edgar Allen, School |
| Point Pleasant Historic District |
| Pond Eddy Bridge |
| Pond Mill Bridge |
| Pont Reading |
| Poole Forge |
| Pool Forge Covered Bridge |
| Poplar Lane |
| Portage Historic District |
| Portico Row |
| Poth and Schmidt Development Houses |
Data from United States Park Service and Wikidata
