Pennsylvania - Area of significance: Conservation
| Awbury Historic District |
| BARNEGAT (lightship) |
| Black Moshannon State Park Day Use District |
| Black Moshannon State Park Family Cabin District |
| Black Moshannon State Park Maintenance District |
| Carson, Rachel, House |
| Cherry Springs Picnic Pavilion |
| Chimney Rocks |
| Clayton-Frick Art Museum Historic District |
| Clear Creek State Park Day Use District |
| Clear Creek State Park Family Cabin District |
| Colton Point State Park |
| Cook Forest State Park Indian Cabin District |
| Cook Forest State Park River Cabin District |
| Cowans Gap State Park Family Cabin District |
| Delaware Division of the Pennsylvania Canal |
| Derry Session House and Enclosure |
| Eagles Mere Historic District |
| Elliott, S. B., State Park Day Use District |
| Elliott, S. B., State Park Family Cabin District |
| Fairmount Park |
| Fallingwater |
| Forester's Hall |
| Franklin Square |
| French Creek State Park: Organized Group Camp 4 District |
| French Creek State Park Six Penny Day Use District |
| Gettysburg Battlefield Historic District |
| Gettysburg National Military Park |
| Greenwood Lake Dam |
| Halfway Lake Dam |
| Hanging Rock |
| Hawk Mountain Sanctuary District |
| Honey Hollow Watershed |
| Kooser State Park Family Cabin District |
| Lacawac |
| Laurel Hill RDA |
| Linn Run State Park Family Cabin District |
| Logan Square |
| Longwood Gardens District |
| Milford Historic District |
| Mill Grove |
| Parker Dam State Park Family Cabin District |
| Parker Dam State Park-Octagonal Lodge |
| Parker Dam State Park-Parker Dam District |
| Pinchot, Gifford, House |
| Promised Land State Park-Bear Wallow Cabins |
| Promised Land State Park Whittaker Lodge District |
| Racoon Creek RDA |
| Ravensburg State Park |
| Rittenhouse Square |
| Rothrock, Joseph, House |
| Springton Manor Farm |
| Stephenson-Campbell House |
| Tyler, John J., Arboretum |
| Washington Square |
| Welkinweir |
| Whipple Dam State Park Day Use District |
| White Horse Historic District |
| Worlds End State Park Family Cabin District |
Data from United States Park Service and Wikidata
