California - Area of significance: Architecture
| Pierotti, Attlio and Jane, House |
| Pigeon Point Lighthouse |
| Pike, Robert and Barbara, House |
| Pilarcitos Creek Bridge |
| Pine Street School |
| Pinschower, Simon, House |
| Pioneer Trunk Factory-C. A. Malm & Co. |
| Pioneer Woolen Mills and D. Ghirardelli Company |
| Pitzer House |
| Piute Pass Archeological District |
| Placer County Bank |
| Plaza Building |
| Plaza Historic District |
| Pleasants Ranch |
| Point Bonita Light Station |
| Point Cabrillo Light Station |
| Point Fermin Historic District |
| Point Montara Light Station |
| Point Pinos Lighthouse |
| Point Reyes Light Station |
| Point Reyes Peninsula Dairy Ranches Historic District |
| Point Richmond Historic District |
| Point Sur Light Station |
| Point Vicente Light |
| POLARIS (research vessel) |
| Pomeroy Green |
| Pomona City Stable |
| Pomona Court and Apartments |
| Pomona Fox Theater |
| Pomona YMCA Building |
| Pope Estate |
| Pope Street Bridge |
| Poppy Peak Historic District |
| Portal of the Folded Wings Shrine to Aviation and Museum |
| Port Costa School |
| Porter Building |
| Porter-French House |
| Porter-Vallejo Mansion |
| Port of San Francisco Embarcadero Historic District |
| Portola Valley School |
| Portuguese Chapel of San Diego |
| Post, George B., House |
| Post, Joseph W., House |
| Pratt, Charles M., House |
| Preston Castle |
| Preston School of Industry |
| Price, John, House |
| Professorville Historic District |
| Prospect Historic District |
| Providence Townsite |
| 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 |
| Radar Station B-71 |
| Railroad Square District |
| Rains, John, House |
| RALPH J. SCOTT |
| Ralphs Grocery Store |
| Ramirez, Jose Manuel, House |
| Ramona Street Architectural District |
| Ramsay-Durfee Estate |
| Rancho Camulos |
| Rancho El Encino |
| Rancho Guajome Adobe |
| Rancho Las Palmas |
| Rancho Los Alamitos |
| Rancho Olompali |
| Rancho Santa Fe Land and Improvement Company Office |
| Rangers' Club |
| Rankin Building |
| Ravenswood |
| Raymond-Summit Historic District |
| RCA Point Reyes Receiving Station |
| Rectory, Catholic Church of the Assumption |
| Redlands Santa Fe Depot District |
| Redman House |
| Redondo Beach Original Townsite Historic District |
| Redondo Beach Public Library |
| Red Rest and Red Roost Cottages |
| Redwood City Historic Commercial Buildings |
| 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 |
| Rengstorff, Henry A., House |
| RENOWN (yacht) |
| Renzel, Ernest & Emily, House |
| Rey, Valentine, House |
| Rhine House |
| Rhoades Ranch |
| Rialto Building |
| Rialto Theatre |
| Rice, Lilian Jenette, House |
| Ricks, Thomas F., House |
| Ridgewood Place Historic District |
Data from United States Park Service and Wikidata
