Colorado - Significance region: Local
| Swink School |
| Tallmadge and Boyer Block |
| Tammen Hall |
| Tarryall Rural Historic District |
| Tarryall School |
| Taylor Memorial Chapel |
| TBM Avenger Aircraft N53503 |
| Tego Brothers Drugstore-State National Bank of Louisville |
| Teller House |
| Tellurium-White Cross Mining Camp |
| Temple Emanuel |
| Temple Emanuel |
| Terrace, The |
| The Bunk House Lodge |
| Thede Farmhouse |
| The Owl Club of Denver |
| The Petroleum Club Building |
| Thiede Ranch |
| Thomas, H. H., House |
| Thomas House |
| Thunder Lake Trail-Bluebird Lake Trail |
| Ticknor Hall |
| Tigiwon Community House |
| Tilden School for Teaching Health |
| Tivoli Brewery Company |
| Tobasco Mine and Mill |
| Toll House |
| Tonahutu Creek Trail |
| Tooke-Nuckolls House |
| Tower of Compassion |
| Tower of Memories |
| Townsend, Thomas B., House |
| Trail School, Old |
| Tramway Building |
| Trinity United Methodist Church |
| Trout Creek-Annex-Settele Ranch |
| Trujillo Homestead |
| Truscott Junior High School |
| Tutt Building |
| Twelfth Street Historic Residential District |
| Twin Creek Ranch |
| Twin Sisters Lookout |
| Two-Bar Ranch |
| Two Buttes Gymnasium |
| Union Avenue Historic Commercial District |
| Union Depot |
| Union High School |
| Union Pacific Railroad Julesburg Depot |
| Union Warehouse |
| United Church of Christ of Highlandlake |
| United Methodist Church of La Junta |
| Upper Brush Creek School |
| Upper Wade and Curtis Cabin |
| U.S. Courthouse and Federal Office Building |
| U.S. Customhouse |
| US National Bank |
| U.S. Post Office |
| U.S. Post Office |
| Ute Cemetery |
| Ute-Ulay Mine and Mill |
| Vail Hotel |
| Vaille, Agnes, Shelter |
| Valley View-Hillcrest Cemetery |
| Valley View Leasing and Mining Company Mill |
| Valley View School |
| Vanatta Apartments |
| Varros, Margarito, Homestead |
| Veta Pass |
| Victor Hotel |
| Victor Williams Homestead-Sprague Sand Creek Ranch |
| Vienna Bakery-Johnson Restaurant |
| Vincent-Hatchette Cabin |
| Vine Street Houses |
| Von Gohren-Thompson Homestead-Gerry Farm Rural Historic Landscape |
| Von Trotha-Firestien Farm at Bracewell |
| Wagon Wheel Gap Fluorspar Mine and Mill |
| Wagon Wheel Gap Hot Springs Resort |
| Wagon Wheel Gap Railroad Station |
| Wahl Ranch |
| Walker Ranch Historic District |
| Wall Street Assay Office |
| Walsenburg Mercantile |
| Walter, Martin, House |
| Walters, Manuella C., Duplex |
| Ward Congregational Church |
| Ward School |
| Warshauer Mansion |
| Wasson-McKay Place |
| Waycott, Ernest, House |
| Webber, Henry, House-Pioneer Park |
| Webster Building |
| Weckbaugh House |
| Weiser, Martha, House |
| Weld County Courthouse |
| Westcliffe Jail |
| Westcliff School |
| Western Hotel |
| Westminster University |
| West Plum Bush Creek Bridge |
| West Side Court Building |
Data from United States Park Service and Wikidata
