California - Criteria: A (event)
| STAR OF INDIA |
| State Asylum for the Deaf,Dumb and Blind |
| State Theatre |
| State Theatre |
| Station and General Office, California Southern Railroad |
| Station KPH Operating Station |
| Stevenson House |
| Stevenson, Robert Louis, Branch |
| St. Francis by-the-Sea American Catholic Church |
| St. George Hotel |
| St. George Reef Light Station |
| St. Helena Public Cemetery |
| St. James Park Historic District |
| St. James Square Historic District |
| St. Joseph Catholic Church, Rectory and Cemetery |
| St. Joseph's Hospital |
| St. Joseph's Roman Catholic Church |
| St. Matthew's Episcopal Church |
| Stockton Savings and Loan Society Bank |
| Stoutenburgh House |
| St. Paul's Methodist Episcopal Church |
| Straight, Charles E., House |
| St. Vincent Orphanage and School Building |
| Subway Terminal Building |
| Sugg House |
| Summit Lake Ranger Station |
| Sunrise High Sierra Camp |
| Sunset Center |
| Susanville Railroad Depot |
| Suscol House |
| Sutherland Fruit Company |
| Sutter Club |
| Sutter Creek Grammar School |
| Sutter's Fort |
| Sweasey Theater-Loew's State Theater |
| Tahoe Meadows |
| Tahquitz Canyon |
| Taoist Temple |
| Taylor, Duckworth and Company Foundry Building |
| TB-9 |
| Teacher Training School Building-San Diego State Normal School |
| Tehachapi Railroad Depot |
| Temelec |
| Temple Sherith Israel |
| Tevis Block |
| Tharp's Log |
| The Bellevue-Staten |
| The Forty Acres |
| The Pioneer |
| The Real Estate Associates (TREA) Houses |
| Thorn House |
| Tidball Store |
| Toberman, C. E., Estate |
| Tocaloma Bridge |
| Tomales Presbyterian Church and Cemetery |
| Topock Maze Archeological Site |
| Torrance School |
| Torrey Pines Gliderport |
| Torrey Pines Lodge |
| Torrey Pines Park Road |
| Tower Bridge |
| Tower House District |
| Track Bus No. 19 |
| Tracy City Hall and Jail |
| Tracy Inn |
| Travelers' Hotel |
| Treadwell Mansion and Carriage House |
| Tribune-Republic Building |
| Trinidad Head Light Station |
| Troy Laundry |
| Tubbs, Alfred L., Winery |
| Tubbs Cordage Company Office Building |
| Tule Lake Segregation Center |
| Tuna Club of Avalon |
| Tuolumne County Courthouse |
| Tuolumne County Jail |
| Tuolumne Meadows |
| Tuolumne Meadows High Sierra Camp |
| Tuolumne Meadows Ranger Stations and Comfort Stations |
| Turlock Carnegie Library |
| Turlock High School Auditorium and Gymnasium |
| Twenty-eighth Street YMCA |
| Twenty-Five Foot Space Simulator |
| Twin Lakes Fire Tool Cache |
| Ukiah Main Post Office |
| Union Church of Dunnigan |
| Union Ferry Depot |
| Union Iron Works Powerhouse |
| Union Iron Works Turbine Machine Shop |
| Unitary Plan Wind Tunnel |
| University Heights Water Storage and Pumping Station Historic District |
| University High School |
| Upland Public Library |
| Uptown Tenderloin Historic District |
| U.S. Appraisers Stores and Immigration Station |
| USCGC STORIS (cutter) |
| US Court House and Post Office |
| US Inspection Station-Calexico |
| U.S. Inspection Station/U.S. Custom House |
| US Naval Air Station Sunnyvale, California, Historic District |
Data from United States Park Service and Wikidata
