All - Architectural style - Tudor Revival architecture
| Newton, Edward B., School |
| Nieman, Edwin J., Sr., House |
| Nienstedt, Herbert, House |
| Nims Mansion |
| Nipher, Prof. Frances e., House |
| North Broadway School |
| Northern Pacific Depot and Freight House |
| North Manor Apartments |
| North School |
| Nottingham Apartments, The |
| Oakland Free Library-Alden Branch |
| Oakmont Country Club Historic District |
| Oak Ridge Apartments |
| Oak Street School |
| Oakton Gables |
| Oatman Filling Station |
| Odd Fellows Building and Auditorium |
| Oddfellows Home |
| Old Batesburg-Leesville High School |
| Old Central High School |
| Old Hattiesburg High School |
| Old Tavern |
| Olean Armory |
| Oliver, John G., House |
| Olympia Fields Country Club |
| Omega Chapter of the Chi Phi Fraternity |
| One Thirty North Eighth Building |
| Oriental Apartments |
| Orr, Charles E., House |
| Osbornedale |
| Osgood-Kuhnhausen House |
| Our Mother of Mercy Catholic Church and Parsonage |
| Outlands in the Eighty Acres |
| Owen Estate |
| Owl's Nest Country Place |
| O & W Railroad Station at Port Ben |
| Oyster Bay Long Island Rail Road Station |
| Paine Estate |
| Palestine High School |
| Patterson, Walter, Filling Station |
| Patton Home |
| Peabody, Royal C., Estate |
| Peabody, The |
| Pearce, John, House |
| Pecue House |
| Peirce, Edward, House-Henderson House of Northeastern University |
| Pennbroke Apartments |
| Period Revival House |
| Perkins, Joe and Lois, House |
| Perry, A. F. and Myrtle-Pitmann House |
| Perry, C. W. Archie-Hallmark House |
| Perry, Edgar H. Jr., House |
| Phi Gamma Delta House |
| Philipse Manor Railroad Station |
| Phillips 66 Station No. 1423 |
| Pickerington Carnegie Library |
| Pickwick |
| Pinecroft |
| Pine Meer |
| Pittsburgh and Lake Erie Passenger Station, Aliquippa |
| Planting Fields Arboretum |
| Plashbourne Estate |
| Plummer, Henry S., House |
| Plummer Memorial Library |
| Plymouth School |
| Poinsett Lumber and Manufacturing Company Manager's House |
| Poppleton Fire Station |
| Porter Hall |
| Postles House |
| Post Office Building, Upper Montclair |
| Potter, Wallace and Glenn, House |
| Powell House |
| Power, Charles Whittlesey, House |
| Presbyterian Rest for Convalescents |
| Presser Home for Retired Music Teachers |
| Price, R. T., House |
| Procter and Collier-Beau Brummell Building |
| Propylaeum, The (John W. Schmidt House) |
| Public Service Building |
| Pure Oil Service Station |
| Pure Oil Station |
| Pyeatte House |
| Pyle, Howard, Studios |
| Rainier Club |
| Ramer, Ralph John, House |
| Ramsay-Durfee Estate |
| Rankin Hall |
| Raoul, Thomas Wadley, House |
| Raymond Park Apartments |
| Red Oak Public Library |
| Red Oak-Sherman, William C., House |
| Redstone Inn |
| Reed Memorial Library |
| Renshaw, Alfred, House |
| Rhodesleigh |
| Ricketts House |
| Rigsbee's Rock House |
| Ringgold County Courthouse |
| Riverbend |
| River Inn |
Data from United States Park Service and Wikidata
