All - Constructed - 1930–1939
| Tall Peak Fire Tower |
| Tallulah Book Club Building |
| Tanttari, Waino, Field Hay Barn |
| Taos Inn |
| Taylor, David W., Model Basin |
| T. B. McCLINTIC |
| Templo del Maestro |
| Texarkana Union Station |
| The Capitol Theater |
| The Epic of American Civilization Murals, Baker Library, Dartmouth College |
| Theodore Roosevelt Island National Memorial |
| The Seaside |
| Theta Xi Fraternity Chapter House |
| Thirtieth Street Station |
| Thomas Jefferson High School |
| Thompson, Alfred and Martha Jane, House and Williams Barn |
| Thompson Mortuary Chapel |
| Thornton, Albert E., House (Additional Doucmentation) |
| Thornwood School |
| Threefoot Building |
| Three Forks Shelter |
| Three Lakes Patrol Cabin |
| Three Springs Pumphouse |
| Thunder Lake Patrol Cabin |
| Thurston County Courthouse |
| Ticonderoga High School |
| Timber Creek Campground Comfort Station No. 245 |
| Timber Creek Campground Comfort Station No. 246 |
| Timber Creek Campground Comfort Station No. 247 |
| Timberline Lodge |
| Tingley, Carrie, Hospital Historic District |
| Tioga Pass Entrance Station |
| Titanic Memorial |
| Tolmie Peak Fire Lookout |
| Tomahawk Lake Country Club |
| Torres, Antonio, House |
| Torreya State Park |
| Tower Hotel |
| Tower Station |
| Tower Theatre |
| Trail Ridge Road |
| Trans-Canyon Telephone Line, Grand Canyon National Park |
| Tribble, Dr. Albert H., House |
| Troop 111 Boy Scout Cabin |
| Truman Parkway-Metropolitan Park System of Greater Boston |
| Tuckahoe High School |
| Tuckerman Water Tower |
| Tufts, William B. and Jennie, House |
| Tumacacori Museum |
| Tunxis Forest Ski Cabin |
| Tuolumne Meadows |
| Turkey Hill Grange Hall |
| Turner House |
| Tuscola County Courthouse |
| Tuzigoot Museum |
| Twin Lakes Fire Tool Cache |
| Twinton Fire Lookout Tower |
| Udell Lookout Tower |
| Umpqua River Bridge No. 01822 |
| Union Depot |
| Union Lookout |
| Union Passenger Terminal |
| United State Post Office, Courthouse, and Federal Building |
| United States Courthouse and Custom House |
| United States Custom House |
| United States Post Office |
| United States Post Office and Court House |
| United States Post Office and Court House |
| United States Post Office, Federal Annex |
| United States Post Office, Westport, Connecticut |
| Universal Laboratories Building |
| University of Oregon Museum of Art |
| University of Wisconsin Field House |
| University Presbyterian Church and Student Center |
| Upper Kintla Lake Patrol Cabin |
| Upper Toklat River Cabin No. 24 |
| Upper Windy Creek Ranger Cabin No. 7 |
| US 71, Greenland Segment, Old |
| US Bullion Depository, Fort Knox, Kentucky |
| US Bullion Depository, West Point, New York |
| USCGC FIR |
| US Courthouse |
| US Court House-Aiken, South Carolina |
| US Court House and Post Office Building |
| USDA Tucson Plant Materials Center |
| U.S. Department of Agriculture Cotton Annex |
| US Department of Agriculture South Building |
| US Department of the Interior Building |
| U.S. Marine Hospital |
| U.S. Naval Radio Station-Apartment Building and Power House |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| US Post Office |
| US Post Office |
| US Post Office |
| US Post Office |
| US Post Office-Alamogordo |
| US Post Office-Albion |
Data from United States Park Service and Wikidata
