California - Role: Building
| Pythian Castle |
| Pythias Lodge Building |
| Quarters 10 and Building 267, Yerba Buena Island |
| Quarters 1, Yerba Buena Island, Naval Training Station |
| Queen Anne Cottage and Coach Barn |
| Quinn Ranger Station |
| Radar Station B-71 |
| Rains, John, House |
| Ralphs Grocery Store |
| Ralston, William C., House |
| Ramirez, Jose Manuel, House |
| Ramona Town Hall |
| Ramos, John, Sherry House-Depot Saloon |
| Ramsay-Durfee Estate |
| Rancho El Encino |
| Rancho Guajome Adobe |
| Rancho Las Palmas |
| Rancho Los Alamitos |
| Rancho Santa Fe Land and Improvement Company Office |
| Rangers' Club |
| Rankin Building |
| Ravenswood |
| Rectory, Catholic Church of the Assumption |
| Redlands Central Railway Company Car Barn |
| Redman House |
| Redondo Beach Public Library |
| Red Rest and Red Roost Cottages |
| Redwood City Woman’s Club |
| Redwood Meadow Ranger Station |
| Reedley National Bank |
| Reedley Opera House Complex |
| Reed's Store |
| Reeve, Jennie A., House |
| Rehorn House |
| Remar Bakery |
| Rengstorff, Henry A., House |
| Renwick, Helen Goodwin, House |
| Renzel, Ernest & Emily, House |
| Republic Cafe |
| Rey, Valentine, House |
| Rhine House |
| Rialto Building |
| Rialto Theatre |
| Rice, Lilian Jenette, House |
| Ricks, Thomas F., House |
| Rincon Annex |
| Rindge, Frederick Hastings, House |
| Riverbank Branch Library |
| Riverside-Arlington Heights Fruit Exchange |
| Riverside Municipal Auditorium and Soldier's Memorial Building |
| Riverview Union High School Building |
| Rives, James C., House |
| Roberto-Sunol Adobe |
| Robinson, Elias H., House |
| Robinson Hotel |
| Robinson, Virginia, Estate |
| Robles, Paso, Carnegie Library |
| Rodgers, Moses, House |
| Rodgers, Patrick, Farm |
| Rogers, Will, House |
| Roma Bakery |
| Romain, Frank, House |
| Ronda |
| Room 307, Gilman Hall, University of California |
| Roop's Fort |
| Roosevelt Building |
| Roos House |
| Rosebud Ranch |
| Rose Court |
| Rosecroft |
| Rosenburg's Department Store |
| Ross House |
| Round Valley Flour Mills |
| Rovegno, Charles, House |
| Rowland, John A., House |
| Royal Laundry Complex |
| Royal Presidio Chapel |
| Royal Theater |
| Roybal, Edward, House |
| Rozas House |
| Ruhstaller Building |
| Rumsey Town Hall |
| Runyon House |
| Sachse Spring Snow Survey Shelter |
| Sacramento Bank Building |
| 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 Paul African Methodist Episcopal Church, Santa Barbara |
| Saint Sava Serbian Orthodox Church |
| San Antonio de Padua Mission |
| San Antonio Heights Grove House |
| San Bernardino County Court House |
| San Clemente Beach Club |
| San Diego Armed Services YMCA |
Data from United States Park Service and Wikidata
