Pennsylvania - Significance region: Local
| Stewart, John, Houses |
| Stewartstown Engine House, Stewartstown Railroad |
| Stewartstown Railroad Station |
| Stewart, Walter and Gertrude May, Farmstead |
| St. Gabriel's Catholic Parish Complex |
| St. Gabriel’s Roman Catholic Church Complex |
| St. Gertrude Roman Catholic Church |
| Stillwater Covered Bridge No. 134 |
| Stirling |
| St. James Hotel |
| St. John's Evangelical Lutheran 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. Joseph's Parish Complex |
| St. Lukes Episcopal Church |
| St. Luke’s Episcopal Church & Throop Memorial Parish House |
| St. Mary's Covered Bridge |
| St. Mary's Episcopal Church |
| St. Milachi Church |
| St. Nicholas Byzantine Catholic Church |
| Stoehr and Fister Building |
| Stoever, John Casper, Log House |
| Stone Arch Road Bridge, Stewartstown Railroad |
| Stonehaven |
| Stoner, Samuel, Homestead |
| Stonorov, Oskar G., House |
| Stotesbury Club House |
| Stouchsburg Historic District |
| Stout, Isaac, House |
| Stover, Isaac, House |
| Stover, Jacob, Farmstead |
| Stover Mill |
| Stover-Myers Mill |
| Stover-Winger Farm |
| Stoystown Historic District |
| St. Patrick's Roman Catholic Church |
| St. Paul African Methodist Episcopal Church |
| St. Paul's Church |
| St. Paul's Episcopal Church |
| St. Paul's Union Church and Cemetery |
| St. Peter's Cathedral Complex |
| St. Peter's Church in the Great Valley |
| St. Peter's Episcopal Church and Rectory |
| St. Peter's Episcopal Church of Germantown |
| St. Peter's Kierch |
| Strafford Railroad Station |
| Strasburg Historic District |
| Strassburger, Reuben and Elizabeth, Farmstead |
| Strawbridge and Clothier Department Store Warehouse |
| Strawbridge and Clothier Store |
| Strickland, William, Row |
| Strickler Family Farmhouse |
| Strip Historic District |
| Strode's Mill Historic District |
| Stroud Mansion |
| Struthers Library Building |
| St. Severin's Old Log Church |
| St. Stanislaus Institute |
| St. Stephen's Church |
| St. Thomas Memorial Church |
| Stupp-Oxenrider Farm |
| Sturgeon House |
| St. Vincent Archabbey Gristmill |
| Suburban Station Building |
| Suffolk Manor Apartments |
| Sugartown Historic District |
| Sullivan County Courthouse |
| Sullivan, James J., School |
| Sulzberger, Mayer, Junior High School |
| Summers, Lewis, Farm |
| Summit Hill High School |
| Summit Hotel |
| Sunnybrook |
| Sun Oil Building |
| Sunrise Mill |
| Susquehanna County Courthouse Complex |
| Sutton-Ditz House |
| Swarr, John and Elizabeth, House |
| Swatara Ferry House |
| Swedish Lutheran Parsonage |
| Swetland Homestead |
| Swigart's Mill |
| Sykes Brothers Yarn Mill |
| Tabor Home for Needy and Destitute Children |
| Tabor Reformed Church |
| Tacony Disston Community Development Historic District |
| Tacony Music Hall |
| Tamaqua Historic District |
| Tasty Baking Company Building |
| Taylor, Bayard, School |
| Taylor, Benjamin, Homestead |
| Taylor-Cope Historic District |
| Taylor House |
| Taylor, Peter, Farmstead |
| Taylor, Phillip, House |
| Taylorstown Historic District |
| Teller Brothers-Reed Tobacco Historic District |
| Teller Cigar Factory |
| Temple Ohave Israel |
Data from United States Park Service and Wikidata
