Pennsylvania - Significance region: National
| Moore, Capt. Thomas, House |
| Moravian Pottery and Tile Works |
| Mother Bethel A.M.E. Church |
| Mount Joy |
| Mount Pleasant |
| Musical Fund Hall |
| Nakashima, George, Woodworker Complex |
| National Transit Building |
| Nazareth Hall Tract |
| Neill-Mauran House |
| Neville House |
| New Century Guild |
| New Holland Machine Company |
| New Kensington Production Works Historic District |
| New Market |
| Ninth Street Bridge |
| Nitre Hall |
| Northern Saving Fund and Safe Deposit Company |
| Oakdale |
| Oakley, Violet, Studio |
| Oakmont Country Club Historic District |
| O'Hara, John, House |
| Old City Historic District |
| Old Customshouse |
| Old Economy |
| Old Germantown Academy And Headmasters' Houses |
| Old Hannastown, Site of |
| Old Main |
| Old Waterworks |
| Old West, Dickinson College |
| Oley Township Historic District |
| Original Little League Field |
| Orthodox Meetinghouse |
| Packard Motor Corporation Building |
| Packer, Asa, Mansion |
| Painter, William, Farm |
| Parker Dam State Park Family Cabin District |
| Parker Dam State Park-Octagonal Lodge |
| Parker Dam State Park-Parker Dam District |
| Parsons-Taylor House |
| Passenger and Baggage Car No. 4639 |
| Passenger Coach No. 3556 |
| Passenger Day Coach No. 8177 |
| Passenger Locomotive No. 1223 |
| Passenger Locomotive No. 1737 |
| Passenger Locomotive No. 460 |
| Passenger Locomotive No. 7002 |
| Peale, Charles Willson, House |
| Penn-Craft Historic District |
| Pennsbury Manor |
| Pennsylvania Academy of the Fine Arts |
| Pennsylvania Hall, Gettysburg College |
| Pennsylvania Hospital |
| Pennsylvania Railroad GG1 Streamlined Electric Locomotive #4859 |
| Penn, William, Landing Site |
| Pennypacker Mansion |
| Petersburg Tollhouse |
| Philadelphia City Hall |
| Philadelphia College of Art |
| Philadelphia Contributionship |
| Philadelphia Naval Shipyard Historic District |
| Philadelphia Savings Fund Society Building |
| Philadelphia School of Design for Women |
| Pinchot, Gifford, House |
| Pittsburgh Renaissance Historic District |
| Plymouth Meeting Historic District |
| Poe, Edgar Allan, House, National Historic Site |
| Pond Eddy Bridge |
| Portico Row |
| Pottsgrove Mansion |
| Powderly, Terence V., House |
| Preston Laboratories |
| Priestley, Joseph, House |
| Princeton Club |
| Printzhof, The |
| Promised Land State Park-Bear Wallow Cabins |
| Promised Land State Park Whittaker Lodge District |
| Pulpit Rocks |
| Pusey, Caleb, House |
| Quay, Matthew S., House |
| Quiet Valley Farm |
| Race Street Friends Meetinghouse |
| Racoon Creek RDA |
| Randolph House |
| Ravensburg State Park |
| Reading-Halls Station Bridge |
| Reading Terminal and Trainshed |
| Reynolds-Morris House |
| RittenhouseTown Historic District |
| Roberts-Quay House |
| Robeson, Paul, House |
| Rockville Bridge |
| Rodale Organic Gardening Experimental Farm |
| Rohm and Haas Corporate Headquarters |
| Rotunda of the Pennsylvania Railroad Station |
| Saxonburg Historic District |
| Searight's Fulling Mill |
| Searights Tollhouse, National Road |
| Second Bank of the United States |
| Seventeen-hundred-and-four House |
Data from United States Park Service and Wikidata
