Pennsylvania - Area of significance: Architecture
| Penn Wynn House |
| Pennypacker, Benjamin, House |
| Pennypacker Mansion |
| Pennypacker, Matthias, Farm |
| Pennypacker, Samuel W., School |
| Peoples Bank Building, The |
| Perikomen Bridge Hotel |
| Perkasie Park Camp Meeting |
| 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 High School for Girls |
| Philadelphia Naval Shipyard Historic District |
| Philadelphia Quartermaster Depot |
| Philadelphia Racquet Club |
| Philadelphia & Reading Railway: Lansdale Passenger Station |
| 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 Furnace |
| Pine Grove Historic District |
| Pinehurst Apartments |
| Pitcairn Building |
| Pittsburgh and Lake Erie Passenger Station, Aliquippa |
| Pittsburgh and Lake Erie Railroad Complex |
| Pittsburgh Athletic Association Building |
| Pittsburgh Central Downtown Historic District |
| Pittsburgh & Lake Erie Railroad Station |
| Pittsburgh Renaissance Historic District |
| Pittsburgh Terminal Warehouse and Transfer Company |
| Plays and Players |
| Plaza Apartments |
| Pleasant Hill Plantation |
| Pleasureville Historic Historic |
| Plymouth Meeting Historic District |
| Pocono Manor Historic District |
| Poe, Edgar Allen, School |
| Point Pleasant Historic District |
| Pont Reading |
| Poole Forge |
| Poplar Lane |
| Portage Historic District |
| Portico Row |
| Poth and Schmidt Development Houses |
| Poth, Frederick A., Houses, |
| Potter-Allison Farm |
| Potter County Courthouse |
| Pottsgrove Mansion |
| Pottstown Landing Historic District |
| Pottstown Roller Mill |
| Pottsville Armory |
| Pottsville Downtown Historic District |
| Powell Farm |
| Powell, John, House |
| Powelton Historic District |
| Powelton, The |
| Powers, Thomas, School |
| Presser Home for Retired Music Teachers |
| Price, Joseph, House |
| Priestley, Dr. Joseph, House |
| Primitive Hall |
| Princeton Club |
| Promised Land State Park-Bear Wallow Cabins |
| Promised Land State Park Whittaker Lodge District |
| Prospect Junior High and Elementary School |
| Protestant Episcopal Church of the Saviour |
| Pusey, Caleb, House |
| Pusey-Crozier Mill Historic District |
| Pusey, Joshua, House |
| Qhandlery Corner |
| Quaker Manor House |
| Quakertown Historic District |
| Quakertown Passenger and Freight Station |
| Quay, Rev. Anderson B., House |
| Queen Anne Historic District |
| Quiet Valley Farm |
| Rabb, Andrew, House |
| Racoon Creek RDA |
Data from United States Park Service and Wikidata
