All - Architectural style - Colonial Revival architecture
| Osage Hills School |
| Ossoli Circle Clubhouse |
| Oteen Veterans Administration Hospital Historic District |
| Otis Elevator Company Factory Building |
| Ouachita County Courthouse |
| Outing Club |
| Overlook |
| Overstreet Hall |
| Owens, Hubert Bond, House |
| Oxford House |
| Oxford, The |
| Oxon Hill Manor |
| Packard, James Ward, House |
| Pagan-Fletcher House |
| Page, Christopher, House |
| Paisley Hall |
| Palmer, E. Payne, House |
| Palmer Home |
| Palmer, Jordan, House |
| Panorama |
| Panther Branch School |
| Pantops Farm |
| Parelius, Martin, Fourplex |
| Parham, Maria, Hospital |
| Paris Post Office |
| Park Apartments |
| Parkesburg School |
| Park Hill |
| Parks-Reagan House |
| Park Street School |
| Parry, John E., House |
| Parsonsfield Seminary |
| Parsons Katy Hospital |
| Partridge Cottage |
| Pascoag Grammar School |
| Paseo YMCA |
| Pataskala Town Hall |
| Patchett House |
| Patman House |
| Patterson, Stanley, Hall |
| Patton Building |
| Patton Home |
| Payne, A.A.-Christo, John Sr., House |
| Payne, Christy, Mansion |
| Peabody Court Apartments |
| Peabody, John P., House |
| Peabody School |
| Peach County Courthouse |
| Peak, George B., House |
| Pearl Street School |
| Pebblebrook Farm House and Gardens |
| Peck, Bradford, House |
| Peck, D. H., House |
| Peden, D. D., House |
| Peeler, Harvey Jeremiah, House |
| Peirce School |
| Peltier House |
| Pelton, Old, Hotel |
| Pender County Courthouse |
| Penney, Samuel, House |
| Penn House |
| Pennington, S. A., House |
| Perkins, A.E., House |
| Perkins, Arthur, House |
| Perkins, Frances, House |
| Perkins, George and Lola, House |
| Perkins Hall of Administration |
| Perkins, John, House |
| Perry Carnegie Library Building |
| Perry-Cherry House |
| Perry County Courthouse |
| Perry, Melvin W. and Mary, House |
| Peterborough Town House |
| Peters, Charles and Josephine, House |
| Peters, George, House |
| Peters House |
| Petterson, Lars-Adolph Carlson Three-Decker |
| Petterson, Lars-Fred Gurney Three-Decker |
| Petterson,Lars-James Reidy Three-Decker |
| Petterson, Lars-Silas Archer Three-Decker |
| Pfeiffer House and Carriage House |
| Phi Kappa Tau Fraternity House |
| Philadelphia Racquet Club |
| Phoenix Building and Loan House |
| Physical Education Building-Arkansas Tech University |
| Pickens, R.A., II, House |
| Pickett County Courthouse |
| Pierce, F. Lincoln, Houses |
| Pierce Pennant Motor Hotel |
| Pierson-Betts House |
| Piggott Post Office |
| Pike, LeRoy F., Memorial Building |
| Piland, J.E., House |
| Pine Bluff-Fitzhugh Historic District |
| Pine Hall |
| Pine Ridge Church |
| Pine Street School |
| Piper, Rufus, Homestead |
| Pirtle House |
| Plant, Samuel, House |
Data from United States Park Service and Wikidata
