California - Criteria: A (event)
| Pacific Electric Railway Company Substation No. 8 |
| Pacific Electric Sub-Station No. 14 |
| Pacific Gas and Electric Company General Office Building and Annex |
| Paddison Ranch Buildings |
| Padua Hills Theatre |
| Palace Hotel |
| Palace of Fine and Decorative Arts, Treasure Island |
| Palace of Fine Arts |
| Palmer, Minnie Hill, House |
| Palo Alto Medical Clinic |
| Palo Alto Stock Farm Horse Barn |
| Palos Verdes Public Library and Art Gallery |
| Pan American National Bank of East Los Angeles |
| Pantages, Alexander, Theater |
| Paramount Theatre |
| Parker House |
| Park Headquarters, Lassen Volcanic National Park |
| Parkhurst Building |
| Park Place Methodist Episcopal Church South |
| Park Street Historic Commercial District |
| Park View Hotel |
| Parsons Memorial Lodge |
| Pasadena Civic Center District |
| Pasadena Playhouse |
| Paso Robles Almond Growers Association Warehouse |
| Patterson Branch Library |
| Patterson, George Washington, Ranch-Ardenwood |
| Pear Lake Ski Hut |
| Pearson, John, Soda Works |
| Pellissier Building |
| Peralta, Antonio Maria, House |
| Peralta, Luis Maria, Adobe |
| Pereira Octagon Barn |
| Perris Depot |
| Petaluma and Santa Rosa Railway Powerhouse |
| Petaluma Historic Commercial District |
| Petaluma Silk Mill |
| PG&E Powerhouse |
| Phelps, Abner, House |
| Phillips Brothers Mill |
| Phillips House |
| Philomathean Clubhouse |
| Physicians Building |
| Picchetti Brothers Winery |
| Piedras Blancas Light Station |
| Pierce Ranch |
| Pier One |
| Pigeon Point Lighthouse |
| PILOT (Pilot Boat) |
| Pine Street School |
| Pioneer Deep Space Station |
| Pioneer Trunk Factory-C. A. Malm & Co. |
| Pisgah Home Historic District |
| Piute Pass Archeological District |
| Placer County Bank |
| Plaza Historic District |
| Plaza Substation |
| Pleasants Ranch |
| Point Arena Light Station |
| Point Arena Rancheria Roundhouse |
| Point Bonita Light Station |
| Point Cabrillo Light Station |
| Point Conception Light Station |
| Point Fermin Lighthouse |
| Point Montara Light Station |
| Point Pinos Lighthouse |
| Point Reyes Lifeboat Rescue Station, 1927 |
| Point Reyes Light Station |
| Point Reyes Naval Radio Compass Station |
| Point Sur Light Station |
| Pomona City Stable |
| Pomona Fox Theater |
| Pomona YMCA Building |
| Pond Farm Pottery Historic District |
| Pony Express Terminal |
| Port Costa School |
| Porter Building |
| Porter-French House |
| Portola Valley School |
| Powerhouse, The |
| Prairie Creek Fish Hatchery |
| Presidio |
| Preston Castle |
| Prince Hall Masonic Temple |
| Princeton Hotel |
| Professorville Historic District |
| Prospect Peak Fire Lookout |
| Pumping Station No. 2 San Francisco Fire Department Auxiliary Water Supply System |
| Punta Gorda Light Station |
| Pythian Castle |
| Pythias Lodge Building |
| Quarters 1, Yerba Buena Island, Naval Training Station |
| Quinn Ranger Station |
| Radar Station B-71 |
| Railroad Square District |
| Rains, John, House |
| RALPH J. SCOTT |
| Ralphs Grocery Store |
| Ramirez, Jose Manuel, House |
| Ramona Town Hall |
Data from United States Park Service and Wikidata
