California - Criteria: C (architecture/engineering)
| Sachse Spring Snow Survey Shelter |
| Sacramento Bank Building |
| Sacramento City Cemetery |
| Sacramento City Library |
| Sacramento Hall of Justice |
| Sacramento Masonic Temple |
| Sacramento Memorial Auditorium |
| Sacred Heart Catholic Church |
| Saint Helena Southern Pacific Railroad Depot |
| Saint John's Presbyterian Church |
| Saint Mary's Parish |
| Saint Sava Serbian Orthodox Church |
| Saline Valley Salt Tram Historic Structure |
| San Antonio de Padua Mission |
| San Bernardino County Court House |
| San Buenaventura Mission Aqueduct |
| Sanchez Adobe Park |
| San Clemente Beach Club |
| San Diego Armed Services YMCA |
| San Diego Athletic Club |
| San Diego Civic Center |
| San Diego State College |
| San Diego Trust and Savings Bank Building |
| San Dimas Hotel |
| San Fernando Building, The |
| San Francisco Central YMCA |
| San Francisco Civic Center Historic District |
| San Francisco Fire Department Engine Co. Number 2 |
| San Francisco Juvenile Court and Detention Home |
| San Francisco National Guard Armory and Arsenal |
| San Francisco-Oakland Bay Bridge |
| San Gabriel Mission |
| San Gregorio House |
| San Joaquin Light & Power Corporation Building |
| San Jose Central Fire Station |
| San Jose Downtown Historic District |
| San Juan Bautista Plaza Historic District |
| San Luis Obispo Carnegie Library |
| San Luis Obispo Light Station |
| San Luis Rey Mission Church |
| San Mateo County Courthouse |
| San Pedro, Los Angeles, & Salt Lake RR Depot |
| San Pedro Municipal Ferry Building |
| San Rafael Improvement Club |
| San Rafael Rancho |
| Santa Ana City Hall |
| Santa Ana Fire Station Headquarters No. 1 |
| Santa Barbara County Courthouse |
| Santa Barbara Mission |
| Santa Barbara Presidio |
| Santa Clara Depot |
| Santa Fe Depot |
| Santa Fe Federal Savings and Loan Association |
| Santa Fe Freight Depot |
| Santa Fe Passenger and Freight Depot |
| Santa Fe Passenger Depot |
| Santa Fe Railway Passenger and Freight Depot |
| Santa Margarita Ranchhouse |
| Santa Paula Hardware Company Block-Union Oil Company |
| Santora Building |
| Sara-Thel Court |
| Saratoga Foothill Club |
| Sargent, Aaron A., House |
| Sargent, B. V., House |
| Sather Gate and Bridge |
| Sather Tower |
| Saticoy Southern Pacific Railroad Depot |
| Sawyers Bar Catholic Church |
| Schaffer, J.W. House |
| Schindler, R. M., House |
| Schoenstein and Company Pipe Organ Factory |
| Schonchin Butte Fire Lookout |
| Scott, Hiram D., House |
| Scripps College for Women |
| Scully Ranch |
| Seal Beach City Hall |
| Second Church of Christ Scientist |
| Second Church of Christ, Scientist |
| Security Bank and Trust Company Building |
| Security-First National Bank of Los Angeles |
| Security Trust and Savings |
| Semorile Building |
| Senior Hall |
| Sequoia Union High School |
| Serrano, Jose, Adobe |
| Sexton, Joseph and Lucy Foster, House |
| Shadelands Ranch House |
| Shady Point |
| Shaffer, Charles A., House |
| Shannon-Williamson Ranch |
| Shasta State Historic Park |
| Shaw House |
| Shell Gas Station |
| Shiloh Baptist Church |
| Shorty Lovelace Historic District |
| Sieroty House |
| Sierra County Sheriff's Gallows |
| Sierraville School |
| Silberstein Park Building |
| Simi Adobe-Strathearn House |
Data from United States Park Service and Wikidata
