Pennsylvania - Criteria: A (event)
| Springdale Mills |
| Springer Farm |
| Springfield Mill |
| Spring Grove Borough Historic District |
| Spring Grove Farm and Distillery |
| Spring Mill Complex |
| Springton Manor Farm |
| Springtown Historic District |
| Spring Valley Historic District |
| Sprowl's Covered Bridge |
| Spruce Creek Rod and Gun Club |
| Spruce Grove School |
| Square Tavern |
| Stanley |
| Stanley Theater and Clark Building |
| St. Anthony de Padua Parish School |
| Staple Bend Tunnel |
| Star Barn Complex |
| Star Junction Historic District |
| Starlight Station, New York, Ontario, and Western Railway |
| State Theatre |
| Stauffer, Christian, House |
| St. Augustine's Catholic Church |
| St. Clement's Protestant Episcopal Church |
| St. David's Church and Graveyard |
| Steel Heddle Manufacturing Company Complex |
| Steelton High School |
| Steen, Robert, House |
| Stegmaier Brewery |
| Stein Mill |
| St. Elizabeth's Convent |
| Stephens, Linton, Covered Bridge |
| Stephenson-Campbell House |
| Sterrett Sub-District School |
| Stevens High School |
| Stevens School |
| Stevens, Thaddeus, School of Observation |
| Stewart, Gen. Thomas J., Memorial Armory |
| Stewartstown Engine House, Stewartstown Railroad |
| Stewartstown Railroad Station |
| St. George's Methodist Church |
| St. Gertrude Roman Catholic Church |
| Stiegel-Coleman House |
| Stillwater Covered Bridge No. 134 |
| St. James Episcopal Church |
| St. John the Baptist Ukranian Catholic Church |
| St. John the Evangelist Roman Catholic Church and School Building |
| St. Joseph's House for Homeless Industrious Boys |
| St. Lukes Episcopal Church |
| St. Mary's Covered Bridge |
| St. Marys Historic District |
| St. Milachi Church |
| St. Nicholas Byzantine Catholic Church |
| Stoddartsville Historic District |
| Stone Arch Road Bridge, Stewartstown Railroad |
| Stouchsburg Historic District |
| Stover Mill |
| Stover-Myers Mill |
| Stover-Winger Farm |
| Stoystown Historic District |
| St. Patrick's Roman Catholic Church |
| St. Peter's Cathedral Complex |
| St. Peters Village Historic District |
| Strafford Railroad Station |
| Strasburg Historic District |
| Strawbridge and Clothier Store |
| Strickland-Roberts Homestead |
| Strickler Family Farmhouse |
| Strode's Mill |
| Strode's Mill Historic District |
| Stroud Mansion |
| Struthers Library Building |
| St. Severin's Old Log Church |
| St. Stanislaus Institute |
| St. Stanislaus Kostka Roman Catholic Church |
| St. Stephen's Church |
| Stupp-Oxenrider Farm |
| Sturgeon House |
| Sturgis, Julius, Pretzel House |
| St. Vincent Archabbey Gristmill |
| Suburban Station Building |
| Sugartown Historic District |
| Summit Hill High School |
| Summit Hotel |
| Sunbury Armory |
| Sunbury Historic District |
| Sunnybrook |
| Sun Oil Building |
| Sunrise Mill |
| Susquehanna County Courthouse Complex |
| Sutton, John, Hall |
| Swatara Furnace |
| Swigart's Mill |
| Switcher No. 1670 |
| Switcher No. 94 |
| Tabor Home for Needy and Destitute Children |
| Tacony Music Hall |
| Tamaqua Historic District |
| Tannery, The |
| Taylor-Cope Historic District |
Data from United States Park Service and Wikidata
