California - Area of significance: Social History
| Smiley Park Historic District |
| Somerville Hotel |
| Sonoma Valley Woman's Club |
| Sonora Youth Center |
| South Berkeley Community Church |
| Southern California Sanitarium Historic District |
| Southern Pacific 16th Street Station and 16th Street Tower |
| South San Francisco Hillside Sign |
| South San Francisco Opera House |
| Southside Park |
| Squatter's Cabin |
| Squaw Creek Archeological Site |
| Standish Hall |
| State Asylum for the Deaf,Dumb and Blind |
| State Theatre |
| Steinbeck, John, House |
| Stevenson, Robert Louis, Branch |
| St. Francis by-the-Sea American Catholic Church |
| St. Helena Public Cemetery |
| St. Hilary's Mission Church |
| St. James Park Historic District |
| St. Joseph's Hospital |
| Stockton Savings and Loan Society Bank |
| Streetcar Depot |
| Stroschein, Carl, House |
| Summit Soda Springs |
| Sutter Club |
| Sutter Creek Grammar School |
| Swedish American Hall |
| Sweet, A. H., Residence and Adjacent Small House |
| Sweet House |
| Temelec |
| Textile Center Building |
| The Forty Acres |
| The Last Resort Historic District |
| Toverii Tuppa |
| Truckee Veterans Memorial Building |
| Tule Lake Segregation Center |
| Tuolumne Meadows |
| Tuolumne Meadows Ranger Stations and Comfort Stations |
| Turlock Carnegie Library |
| Union Cemetery |
| Union Church of Dunnigan |
| Upland Public Library |
| Uptown Tenderloin Historic District |
| USCGC STORIS (cutter) |
| Valencia Hall |
| Van Nuys Branch |
| Venice Branch |
| Vermont Square Branch |
| Veterans Home of California Chapel |
| Veterans Memorial Building |
| Villa Montalvo |
| Walnut Grove Gakuen Hall |
| Wasco Union High School Auditorium |
| Washington School |
| We and Our Neighbors Clubhouse |
| Weaverville Historic District |
| Webster Schoolhouse, Old |
| Wednesday Club of Suisun |
| Weedpatch Camp |
| Wheatland Masonic Temple |
| Wiipuk uun'yaw Trail |
| Willits Carnegie Library |
| Wilmington Branch |
| Wilshire Branch |
| Woman's Athletic Club of San Francisco |
| Woman’s Club of Bakersfield |
| Woman's Club of Hollywood |
| Woman's Club of Lincoln |
| Woman's Club of Lodi |
| Woman's Club of Palo Alto |
| Woman's Club of Redondo Beach |
| Woman's Improvement Club Clubhouse |
| Women's Athletic Club of Alameda County |
| Women's Building, The |
| Women's Improvement Club of Hueneme |
| Women's Twentieth Century Club of Eagle Rock |
| Woodbridge Masonic Lodge No. 131 |
| Woodhills |
| Woodland Opera House |
| Workman Adobe |
| Yamanouchi, Yoshiko, House |
| Yamashiro Historic District |
| YMCA Hotel |
| Yolo Branch Library |
| Yorba-Slaughter Adobe |
| York House |
| Young Men's Christian Association-Santa Ana-Tustin Chapter |
| Yreka Carnegie Library |
| Y.W.C.A. Building |
Data from United States Park Service and Wikidata
