All - Architectural style - Neoclassical architecture
| Paintsville Public Library |
| Palace Theater |
| Palacio del Marques de las Claras |
| Palmer House |
| Paramount Theatre |
| Paris and Weaver Apartment Buildings |
| Paris Carnegie Public Library |
| Paris Commercial Historic District |
| Park and Tilford Building |
| Park Building |
| Parkdale Methodist Church |
| Park Elementary School |
| Parker High School Auditorium |
| "Parker, Lester S. and Missouri ""Zue"" Gordon, House" |
| Parkesburg National Bank |
| Park Front |
| Park Place Methodist Episcopal Church South |
| Park Road Courts |
| Park Row Building |
| Park Theatre |
| Parnell Hall |
| Pasco County Courthouse |
| Passionist Fathers Monastery |
| Pataskala Banking Company |
| Patrick-Carr-Herring House |
| Patrick, Dr. John B., House |
| Patterson Branch Library |
| Patterson House |
| Pauteon Otero-Martinez |
| Pawnee City Carnegie Library |
| Pawnee County Courthouse |
| Paxton Carnegie Public Library |
| Payette City Hall and Courthouse |
| Peabody High School |
| Peabody Township Carnegie Library |
| Peacock Apartments |
| Peak's Suburban Addition Historic District |
| Pearl Street School |
| Peck, Clarence, Residence |
| Pelham Library and Memorial Building |
| Pence Automobile Company Building |
| Pence Automobile Company Warehouse |
| Penley House |
| Pennsylvania |
| Pennsylvania Railroad Office Building |
| Pennsylvania State Lunatic Hospital |
| People's Bank |
| Peoples Bank Building |
| Peoples Bank Company Building |
| Peoples National Bank and Trust Company Building |
| Peoples National Bank Building |
| Peoples Nationals Bank |
| Perkins County Courthouse |
| Perna Brothers' Chesapeake Street Houses |
| Perry-Cherry House |
| Pershing County Courthouse |
| Person County Courthouse |
| Peters House |
| Peterson-Wilbanks House |
| Pettey House |
| Pevely Dairy Company Plant |
| Peyser Building-Security Savings and Commercial Bank |
| Phelps Town Hall |
| Phillips, George, House |
| Phipps-Wallace Store Building |
| Phoenix Building |
| Phoenix Elementary School District No. 1 Administration Building |
| Phoenix Union High School Historic District |
| Pi Chapter House of Psi Upsilon Fraternity |
| Pickens County Courthouse |
| Pickering House |
| Pierce County Courthouse |
| Pierce County Courthouse |
| Pierotti, Attlio and Jane, House |
| Pierre Masonic Lodge |
| Pigford Building |
| Pike County Courthouse |
| Pike County Hospital |
| Pilgrim and Puritan Apartment Complex |
| Pine Bluffs High School |
| Pinellas County Courthouse, Old |
| Pine Tree Lumber Company Office Building |
| Piqua High School |
| Pisek School |
| Pitt County Courthouse |
| Pittsburg Commercial Historic District |
| Pittsburgh Brass Manufacturing Company Building |
| Pittsburgh & Lake Erie Railroad Station |
| Plainfield Masonic Temple |
| Plainview Commercial Historic District |
| Planters Bank Building |
| Planters Building |
| Plaquemine High School |
| Platte County Courthouse |
| Platte County Courthouse |
| Playmakers Theatre |
| Plaza Theatre |
| Pleasants County Courthouse |
| Pleasant View |
| Plymouth, The |
Data from United States Park Service and Wikidata
