Pennsylvania - Criteria: A (event)
| Taylorstown Historic District |
| Teller Brothers-Reed Tobacco Historic District |
| Teller Cigar Factory |
| Terminal Commerce Building |
| Terracina |
| Teutonia Maennerchor Hall |
| The Elverson Building |
| Thomas Brothers Store |
| Thomas Covered Bridge |
| Thomas Marble Quarry Houses |
| Thomas, M. Carey, Library, Bryn Mawr College |
| Thomas Mill Covered Bridge |
| Thome, James, Farm |
| Thompson Cottage |
| Thompson Mill |
| Thornburg Historic District |
| Titusville City Hall |
| Titusville Historic District |
| Towanda Historic District |
| Townhouse Row |
| Trenton City/Calhoun Street Bridge |
| Trexler Historic District |
| Trimbleville Historic District |
| Trinity Lutheran Church |
| Trostletown Bridge |
| Troy Public High School |
| Trusal Covered Bridge |
| Tuberculosis Hospital of Pittsburgh |
| Tulpehocken Creek Historic District |
| Tulpehocken Manor Plantation |
| Tulpehocken Station Historic District |
| Tunkhannock Historic District |
| Tunkhannock Viaduct |
| Turn, John, Farm |
| Turn Store and the Tinsmith's Shop |
| Tuscarora Academy |
| Twentieth Century Club of Lansdowne |
| Twin Bridges-East Paden Covered Bridge No. 120 |
| Twin Bridges Rural Historic District |
| Twin Bridges-West Paden Covered Bridge No. 121 |
| Tyler, John J., Arboretum |
| Tyrone Armory |
| Tyrone Borough Historic District |
| Uhlerstown Historic District |
| Ulery Mill |
| Uneek Havana Cigar Company |
| Union Canal Tunnel |
| Union City Historic District |
| Union Hotel |
| Union Library Company |
| Union School |
| Uniontown Downtown Historic District |
| Unionville Historic District |
| Unionville Village Historic District |
| United Cigar Manufacturing Company |
| United States Post Office-Main Branch |
| United States Post Office-Punxsutawney |
| University of Pennsylvania Campus Historic District |
| Upper Aquetong Valley Historic District |
| Upper Roxborough Historic District |
| Uptown Somerset Historic District |
| Uptown Theater and Office Building |
| U.S. Naval Home |
| US Post Office-Charleroi |
| US Post Office-Connellsville |
| US Post Office-Hanover |
| USS BECUNA (SS-319) |
| U.S.S. NIAGARA |
| U.S.S. OLYMPIA |
| Uwchlan Meetinghouse |
| Valley Forge National Historical Park |
| Valley Road Bridge, Stewartstown Railroad |
| Vandergrift Historic District |
| Van Kirk Farm |
| Van Sant Covered Bridge |
| Vare, Edwin H., Junior High School |
| Vaughan, Rev. Joshua, House |
| Village of Edgewood Historic District |
| Villa Maria Academy |
| Wable-Augustine Tavern |
| Waggoner Covered Bridge |
| Wagner Covered Bridge No. 19 |
| Wagner Free Institute of Science |
| Wagner's, Charlie, Cafe |
| Walker, Joseph, House |
| Wallace-Baily Tavern |
| Wallace-Cross Mill |
| Wall House |
| Walnut Street Bridge |
| Walnut Street Theatre |
| Walt Disney Elementary School |
| Walter's Mill Bridge |
| Walton, Asa, House |
| Wanamaker, John, Store |
| Wanich Covered Bridge No. 69 |
| Warburton House |
| Warner Theater |
| Warren Armory |
| Warren Historic District |
| Warrenpoint |
Data from United States Park Service and Wikidata
