All - Constructed - 1900–1909
| Page and Son Apartments |
| Page, Daniel R. and Sophia G., House |
| Page Soddy |
| Paisley Hall |
| Palace Hotel |
| Palatine Road Brige over a minor tributary of the Lamington River |
| Palisades Bridge |
| Pallay Building |
| Palmer Hall |
| Palmer House Hotel |
| Palmer Memorial Institute Historic District |
| Palms, The |
| Palm Tree Road Bridge |
| Pardee, George, House |
| Parker, Arthur M., House |
| Parker Carousel |
| Parmley Land Office |
| Patterson, A. W., House |
| Patton Home |
| Pawnee City Carnegie Library |
| Payne, William A., House |
| Peck Ledge Lighthouse |
| Peck's Ferry Bridge |
| Peery Apartments |
| Peet, David N., Farmstead |
| Pendennis Club Apartment Building |
| Pendle Hill |
| Penniman Castle |
| People's Supply Company |
| Peoria State Hospital |
| Percy-Lobdell Building |
| Pere Marquette Railroad Depot, Bay City Station |
| Perley, Moses P., House |
| Perry County Courthouse |
| Perry High School |
| Perry, Melvin W. and Mary, House |
| Perry, Ralph P., House |
| Peshtigo Reef Light |
| Petaluma and Santa Rosa Railway Powerhouse |
| Petersburg Jail |
| Peters, Ferdinand, House |
| Peters, George, House |
| Peterson Avenue Hill |
| Peterson-Burr House |
| Peterson Manufacturing Building |
| Pettigrew Barns |
| Pettit Memorial Chapel |
| Philadelphia City Hall |
| Philadelphia Toboggan Company Carousel Number 15 |
| Phillips, Alfred, House |
| Phillips Bridge |
| Phillips High School |
| Pickens County Jail |
| Picotte, Susan La Flesche, House |
| Pierce County Courthouse |
| Pike Place Public Market Historic District |
| Pilgrim Family Farmstead |
| Pilot Butte Canal: Downtown Redmond Segment Historic District |
| Pine Ridge Church |
| Pink Palace |
| Pioneer Club |
| Piscorski, Jose, Building |
| Pittsburgh Athletic Association Building |
| Pittsburgh Brass Manufacturing Company Building |
| Plaza Apartments |
| Plaza Hotel |
| Plummer Mine Headframe |
| Pocatello Carnegie Library |
| Point Arena Rancheria Roundhouse |
| Point Cabrillo Light Station |
| Pointe Coupee Parish Courthouse |
| Point No Point Light Station |
| Point Retreat Light Station |
| Poland Spring Beach House, (Former) |
| Poland Spring Bottling Plant and Spring House |
| Polecat Creek Bridge |
| Polish Home Hall |
| Poli's Palace Theater |
| Pollock Depot |
| Pomeroy, L. A., House |
| Ponce High School |
| Pool's Mill Covered Bridge |
| Portage Street Fire Station |
| Porter Houses and Armstrong Kitchen |
| Portland City Hall |
| Port Mahon Lighthouse |
| Poulan Library |
| Poynor Junior High School |
| Prentice Co-operative Creamery Company |
| Prescott Public Library |
| Preston House |
| Printz, Abram and Sallie, Farm |
| Proctor Building |
| Providence Steel and Iron Company Complex |
| Prowers Bridge |
| Public Baths |
| Putnam, Jane E., Memorial Chapel |
| Quackenbush Hardware Store |
| Quarnberg, Peter, House |
| Queen Anne High School |
Data from United States Park Service and Wikidata
