Pennsylvania - Criteria: C (architecture/engineering)
| 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 |
| Turtle Creek High School |
| Tuscarora Academy |
| Twaddell's Mill and House |
| 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 |
| Twining Farm |
| Twin Trees Farm |
| Tyler, George F., Mansion |
| Tyler, John J., Arboretum |
| Tyrone Armory |
| Tyrone Borough Historic District |
| Uhlerstown Historic District |
| Uneek Havana Cigar Company |
| Union Canal Tunnel |
| Union Church and Burial Ground |
| Union City Historic District |
| Union Hotel |
| Union Library Company |
| Union Methodist Episcopal Church |
| Uniontown Downtown Historic District |
| Union Trust Building |
| Unionville Historic District |
| Unionville Village Historic District |
| United Cigar Manufacturing Company |
| United States Custom House |
| United States Post Office-Main Branch |
| United States Post Office-Punxsutawney |
| United States Post Office-Sewickley Branch |
| Universalist Meeting House of Sheshequin |
| University Avenue Bridge |
| University of Pennsylvania Campus Historic District |
| Upper Aquetong Valley Historic District |
| Upper Roxborough Historic District |
| Upsala |
| Uptown Somerset Historic District |
| Uptown Theater and Office Building |
| US Court House and Post Office Building |
| U.S. Naval Home |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| US Post Office and Courthouse-Pittsburgh |
| US Post Office-Charleroi |
| US Post Office-Connellsville |
| US Post Office-Hanover |
| USS BECUNA (SS-319) |
| Valley Road Bridge, Stewartstown Railroad |
| Vandergrift Historic District |
| Van Dyne Civic Building |
| Van Kirk Farm |
| Van Sant Covered Bridge |
| Vansant Farmhouse |
| Vare, Abigail, School |
| Vare, Edwin H., Junior High School |
| Vaux, Roberts, Junior High School |
| Vicary, Capt. William, House |
| Vigilant Fire Company Firemen's Monument |
| Village of Edgewood Historic District |
| Villa Maria Academy |
| Vincent Forge Mansion |
| Virginville Historic District |
| Wable-Augustine Tavern |
| Waggoner, Daniel, Log House and Barn |
| Wagner Covered Bridge No. 19 |
| Wagner Free Institute of Science |
| Wagner, Gen. Louis, Junior High School |
| Wagner's, Charlie, Cafe |
| Waldenmark |
| Walker-Ewing Log House |
| Walker, Joseph, House |
| Wallace-Baily Tavern |
| Walnut-Chancellor Historic District |
| Walnut Park Plaza Hotel |
| Walnut Street Bridge |
| Walt Disney Elementary School |
| Walter, Henry, House |
| Walter, John, Farmstead |
| Walter's Mill Bridge |
| Walton, Asa, House |
| Walton, Rudolph, School |
| Wanich Covered Bridge No. 69 |
| Wanner, Peter, Mansion |
| Warburton House |
| Warden, Samuel, House |
| Warner, Isaiah, Farmstead |
| Warner Theater |
| Warner Theater |
| Warren Armory |
| Warren County Courthouse |
| Warren Historic District |
| Warrenpoint |
Data from United States Park Service and Wikidata
