Pennsylvania - Area of significance: Transportation
| Ninth Street Bridge |
| Noon, Philip, House |
| North Broad Street Station, Reading Company |
| Northbrook Historic District |
| North Oriental Covered Bridge |
| Old Columbia-Wrightsville Bridge |
| Old Mauch Chunk Historic District |
| Old Rose Tree Tavern |
| Oregon Mill Complex |
| Osterburg Covered Bridge |
| Packsaddle Bridge |
| Parker's Ford |
| Parr's Mill Covered Bridge No. 10 |
| 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 |
| Patterson Covered Bridge No. 112 |
| Pawling, Isaac, House |
| Pennsylvania Canal and Limestone Run Aqueduct |
| Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch |
| Pennsylvania Main Line Canal, Juniata Division, Canal Section |
| Pennsylvania Railroad Bridge |
| Pennsylvania Railroad Bridge over Shavers Creek |
| Pennsylvania Railroad District |
| Pennsylvania Railroad Freight Building |
| Pennsylvania Railroad Freight Station |
| Pennsylvania Railroad GG1 Streamlined Electric Locomotive #4859 |
| Pennsylvania Railroad Office Building |
| Pennsylvania Railroad Old Bridge over Standing Stone Creek |
| Pennsylvania Railroad Passenger Station |
| Pennsylvania Railroad Station |
| Pennsylvania Railroad Station at Wayne |
| Pennsylvania Railroad Station-Latrobe |
| Pennsylvania Railroad Station-Wilkinsburg |
| Petersburg Tollhouse |
| Philadelphia & Reading Railway: Lansdale Passenger Station |
| Pine Bank Covered Bridge |
| Pine Grove Covered Bridge |
| Pine Grove Historic District |
| Pinetown Covered Bridge |
| Pine Valley Covered Bridge |
| Pittsburgh and Lake Erie Passenger Station, Aliquippa |
| Pittsburgh and Lake Erie Railroad Complex |
| Pittsburgh & Lake Erie Railroad Station |
| Plant's Covered Bridge |
| Pleasantville Bridge |
| Point Pleasant Historic District |
| Pool Forge Covered Bridge |
| Portage Historic District |
| Presque Isle Light |
| Quakertown Historic District |
| Quakertown Passenger and Freight Station |
| Railroad Borough Historic District |
| Ralston Freeman Covered Bridge |
| Ramp Covered Bridge |
| Reading-Halls Station Bridge |
| Reading Railroad Freight Station |
| Reading Railroad Passenger Station-Tamaqua |
| Reading Railroad Pottstown Station |
| Reading Railroad Station |
| Reading Terminal and Trainshed |
| Rebersburg Historic District |
| Red Covered Bridge |
| Red Run Covered Bridge |
| Rex Covered Bridge |
| Rice Covered Bridge |
| Rice's Landing Historic District |
| Richards Covered Bridge |
| Ridge Road Bridge, Stewartstown Railroad |
| Riegel Covered Bridge No. 6 |
| Rishel Covered Bridge |
| Rockville Bridge |
| Roebling, John, House |
| Rohrbach Covered Bridge No. 24 |
| Rotunda of the Pennsylvania Railroad Station |
| Rupert Covered Bridge No. 56 |
| Rush House |
| Ryot Covered Bridge |
| Salem Crossroads Historic District |
| Saltsburg Historic District |
| Sauck's Covered Bridge |
| Saville Covered Bridge |
| Sawhill Covered Bridge |
| Saxonburg Historic District |
| """S"" Bridge" |
| Scenery Hill Historic District |
| Schellsburg Historic District |
| Scherer, Frank C., Wagon Works |
| Schlicher Covered Bridge |
| Schuylkill County Bridge No. 113 |
| Schuylkill County Bridge No. 114 |
| Schuylkill Navigation Canal, Oakes Reach Section |
| Scott Covered Bridge |
| Scott Creek Bridge-North, Maryland and Pennsylvania Railroad |
| Searights Tollhouse, National Road |
| Seigrist's Mill Covered Bridge |
Data from United States Park Service and Wikidata
