California - Area of significance: Architecture
| Sovereign Hotel |
| Sowden, John, House |
| Spencer, John, House |
| Sperry Office Building |
| Sperry Union Flour Mill |
| Spreckels Theatre Building |
| Spring Street Financial District |
| Spurgeon Block |
| Squire, John Adam, House |
| SS POMONA (Shipwreck) |
| SS RIO DE JANEIRO Shipwreck |
| SS WINFIELD SCOTT (Steamship) |
| Stadtmuller House |
| Stage Stop |
| STAMBOUL (Whaling Bark) |
| Standard Oil Building |
| St. Andrews Bungalow Court |
| St. Andrews Square Historic District |
| Stanford-Lathrop House |
| Stanislaus Branch, California Forest and Range Experiment Station |
| Stansbury House |
| Stanton, Phillip Ackley, House |
| State Asylum for the Deaf,Dumb and Blind |
| State Theatre |
| Station and General Office, California Southern Railroad |
| Steedman Estate |
| Steinbeck, John, House |
| Stevens House |
| Stevenson, Robert Louis, Branch |
| Stevens, Sherman, House |
| St. Francis by-the-Sea American Catholic Church |
| St. Francis Wood Historic District |
| St. George Hotel |
| St. Helena Catholic Church |
| St. Helena High School |
| St. Helena Historic Commercial District |
| St. Helena Public Library |
| St. Hilary's Mission Church |
| Stimson House |
| St. James Park Historic District |
| St. James Square Historic District |
| St. John’s Chapel, Del Monte |
| St. John's Episcopal Church |
| St. John's Episcopal Church |
| St. John's Lutheran Church |
| St. John's Presbyterian Church |
| St. Joseph Catholic Church, Rectory and Cemetery |
| St. Joseph's Basilica |
| St. Joseph's Church and Complex |
| St. Joseph's Home for the Aged |
| St. Joseph's Hospital |
| St. Joseph's Roman Catholic Church |
| St. Louis Catholic Church |
| St. Luke’s Episcopal Church |
| St. Matthew's Episcopal Church |
| St. Michael's Episcopal Church |
| Stockton Savings and Loan Society Bank |
| Stoesser Block and Annex |
| Stone House |
| Stoner House |
| Storer House |
| Stoutenburgh House |
| St. Paulus Lutheran Church |
| Straight, Charles E., House |
| Strand Theater |
| Strathmore Apartments |
| St. Raymond's Church |
| Streetcar Depot |
| Strout, George A., House |
| Stuart Company Plant and Office Building |
| Studio Building |
| St. Vincent Orphanage and School Building |
| Subway Terminal Building |
| Sugar Pine Point State Park |
| Sugg House |
| Suisun Masonic Lodge No. 55 |
| Summit Soda Springs |
| Sun House |
| Sunnyslope Lodge |
| Sunset Center |
| Sunset Towers |
| Superior Oil Company Building |
| Suscol House |
| Sutherland Fruit Company |
| Sutter Club |
| Sutter Creek Grammar School |
| Swain, C.W., House |
| Sweasey Theater-Loew's State Theater |
| Swedenborgian Church |
| Swedish American Hall |
| Sweed, Philip, House |
| Sweet, A. H., Residence and Adjacent Small House |
| Sweet House |
| Sweetser Residence |
| Synder, John J., House |
| Tahoe Meadows |
| Talmadge Park Estates Historic District |
| Tassajara One Room School |
| Taylor, Duckworth and Company Foundry Building |
| Teacher Training School Building-San Diego State Normal School |
Data from United States Park Service and Wikidata
