California - Area of significance: Architecture
| Temelec |
| Temple Mansion |
| Temple Sherith Israel |
| Tenalu |
| Terminous Culling Chute |
| Terwilliger, Claude and Florence, House |
| Tevis Block |
| Textile Center Building |
| The Bellevue-Staten |
| The Last Resort Historic District |
| The Real Estate Associates (TREA) Houses |
| "Thomas, Franklin Rosborough ""Frank"", House" |
| Thorn House |
| Thorsen, William R., House |
| Timby House |
| Tioga Hotel |
| Tioga Pass Entrance Station |
| Title Guarantee and Trust Company Building |
| Toad Hall |
| Toberman, C. E., Estate |
| Tobin House |
| Tomales Presbyterian Church and Cemetery |
| Torpedo Storehouse-Torpedo (Mine) Assembly Building & Long Range Accuracy Storage Building |
| Torrance School |
| Torrey, Joseph and Carrie, House |
| Torrey Pines Lodge |
| Toverii Tuppa |
| Tower Bridge |
| Tower Theatre |
| Town Creek Archeological Site |
| Town House, The |
| Tracy City Hall and Jail |
| Tracy Inn |
| Tramway Gas Station |
| Travelers' Hotel |
| Treadwell Mansion and Carriage House |
| Tretheway Block |
| Trimmer Hill |
| Trinidad Head Light Station |
| Trinity Church |
| Trinity Presbyterian Church |
| Troy Laundry |
| Truckee Veterans Memorial Building |
| Truxaw-Gervais House |
| Tucker House |
| Tufts, Joshua B., House |
| Tulare Union High School Auditorium and Administration Building |
| Tule Lake Segregation Center |
| Tuna Club of Avalon |
| Tuolumne County Courthouse |
| Tuolumne Meadows |
| Tuolumne Meadows Ranger Stations and Comfort Stations |
| Tupper and Reed Building |
| Turlock Carnegie Library |
| Turlock High School Auditorium and Gymnasium |
| Twentieth Street Historic District |
| Twining Laboratories |
| Twin Lakes Fire Tool Cache |
| Twohy Building |
| Ukiah Main Post Office |
| Union Church of Dunnigan |
| Union Ferry Depot |
| Union Iron Works Historic District |
| Union Iron Works Powerhouse |
| Union Iron Works Turbine Machine Shop |
| United States Post Office-Main Street Branch |
| University Art Museum |
| University Heights Junior High School |
| University High School |
| University House |
| University of Southern California Historic District |
| Upland Public Library |
| Uptown Tenderloin Historic District |
| U.S. Courthouse |
| US Court House and Post Office |
| U.S. Customhouse |
| U.S. Customhouse |
| US Inspection Station-Calexico |
| US Inspection Station-Tecate |
| U.S. Inspection Station/U.S. Custom House |
| US Naval Air Station Sunnyvale, California, Historic District |
| US Post Main Office-San Mateo |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| US Post Office-Beverly Hills Main |
| US Post Office-Burbank Downtown Station |
| US Post Office-Chico Midtown Station |
| U.S. Post Office, Courthouse and Federal Building |
| US Post Office-Downtown Station |
| US Post Office-Downtown Station |
| US Post Office-El Centro Main |
| US Post Office-Glendale Main |
| US Post Office-Hollywood Station |
| US Post Office-Long Beach Main |
| US Post Office-Los Angeles Terminal Annex |
Data from United States Park Service and Wikidata
