Colorado - Criteria: A (event)
| St. Stephen's Episcopal Church, 1881 |
| Sugar Building |
| Summit Lake Park |
| Sunken Gardens |
| Sunshine School |
| Swedish Evangelical Lutheran Church of Ryssby |
| TBM Avenger Aircraft N53503 |
| Telephone Building |
| Telluride Historic District |
| Temple Emanuel |
| Terrace, The |
| Thede Farmhouse |
| Thunder Lake Trail-Bluebird Lake Trail |
| Ticknor Hall |
| Tigiwon Community House |
| Timberline Cabin |
| Tivoli Brewery Company |
| Tonahutu Creek Trail |
| Trail Ridge Road |
| Tramway Building |
| Trinity United Methodist Church |
| Trujillo Homestead |
| Twin Lakes District |
| Two Buttes Gymnasium |
| Union Avenue Historic Commercial District |
| Union Depot |
| Union High School |
| Union Pacific Railroad Julesburg Depot |
| Union Station |
| Union Warehouse |
| United States Air Force Academy, Cadet Area |
| Upper Brush Creek School |
| Upper Wade and Curtis Cabin |
| US Bureau of Reclamation Project Office Building |
| US Post Office and Federal Building-Delta Main |
| US Post Office and Federal Courthouse-Colorado Springs Main |
| US Post Office-Florence Main |
| US Post Office-Manitou Springs Main |
| Ute Cemetery |
| Valley View School |
| Vanatta Apartments |
| Van Briggle Pottery Company |
| Vicksburg Mining Camp |
| Victor Downtown Historic District |
| Vienna Bakery-Johnson Restaurant |
| Von Trotha-Firestien Farm at Bracewell |
| Walker Ranch Historic District |
| Wall Street Assay Office |
| Walter, Martin, House |
| Ward Congregational Church |
| Washington Park |
| Waterwheel |
| Webster Building |
| Weld County Courthouse |
| Westcliffe Jail |
| Westminster University |
| West Plum Bush Creek Bridge |
| West Side Court Building |
| Wetmore Post Office |
| Wheeler Opera House |
| Wheeler-Stallard House |
| White School |
| Wildhack's Grocery Store-Post Office |
| Wiley Rock Schoolhouse |
| Wilson, Blanche A., House |
| Wilson, S.A., Elementary School |
| Windsor Town Hall |
| Winfield Mining Camp |
| Winks Panorama |
| Wolfe, John, House |
| Young Women's Christian Association |
| Ypsilon Lake Trail |
| Y.W.C.A. |
| Zapata Ranch Headquarters |
| Zeitz Buckhorn Exchange |
| Zion, Walter and Anna, Homestead |
Data from United States Park Service and Wikidata
