California - Area of significance: Architecture
| Rincon Annex |
| Rindge, Frederick Hastings, House |
| Riverside-Arlington Heights Fruit Exchange |
| Riverside Municipal Auditorium and Soldier's Memorial Building |
| Rives, James C., House |
| Riviera Gardens |
| Roberto-Sunol Adobe |
| Robinson, Elias H., House |
| Robinson, Virginia, Estate |
| Rock Tank Corral |
| Rockwell Field |
| Romain, Frank, House |
| Ronda |
| Roop's Fort |
| Roosevelt Building |
| Roos House |
| Rosebud Ranch |
| Rose Court |
| Rosecroft |
| Rosenburg's Department Store |
| Rosicrucian Fellowship Temple |
| Ross House |
| Round Valley Flour Mills |
| Rovegno, Charles, House |
| Rowland, John A., House |
| Royal Laundry Complex |
| Royal Presidio Chapel |
| Royal Theater |
| Rozas House |
| Rubel Castle Historic District |
| Ruhstaller Building |
| Runyon House |
| Russian Hill-Macondray Lane District |
| Russian Hill-Paris Block Architectural District |
| Russian Hill-Vallejo Street Crest District |
| Russian Village District |
| Ryan Historic District |
| Sachse Spring Snow Survey Shelter |
| Sacramento Air Depot Historic District |
| Sacramento Bank Building |
| Sacramento City Cemetery |
| Sacramento City Library |
| Sacramento Hall of Justice |
| Sacramento Junior College Annex and Extensions |
| Sacramento Masonic Temple |
| Sacramento Memorial Auditorium |
| Sacramento Northern Railway Historic District |
| Sacramento Shops Historic District |
| Sacred Heart Catholic Church |
| Sacred Heart Parish Complex |
| Saint Helena Southern Pacific Railroad Depot |
| Saint John's Presbyterian Church |
| Saint Mary's Parish |
| Saint Paul African Methodist Episcopal Church, Santa Barbara |
| Saint Sava Serbian Orthodox Church |
| Saint Vincent's Hill Historic District |
| Saline Valley Salt Tram Historic Structure |
| San Antonio de Padua Mission |
| San Antonio Heights Grove House |
| San Bernardino County Court House |
| Sanchez Adobe Park |
| San Clemente Beach Club |
| Sandcliff |
| 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 Francisco Public Library North Beach Branch |
| San Gabriel Mission |
| San Gabriel Mission Playhouse |
| 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 Juan Bautista Third Street 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 Club |
| Santa Barbara County Courthouse |
| Santa Barbara Mission |
| Santa Barbara Presidio |
| Santa Barbara Veterans Memorial Building |
Data from United States Park Service and Wikidata
