Alabama - Area of significance: Architecture
| Old Courthouse |
| Old Dauphin Way Historic District |
| Old Jail |
| Old Main and Church Street Historic District |
| Old Monroe County Courthouse |
| Old Observatory |
| Old Pell City Historic District |
| Old Ship African Methodist Episcopal Zion Church |
| Old Town Historic District |
| Old Town Historic District |
| Old Tuscaloosa County Jail |
| Oliver, Ernest McCarty, House |
| Opp Commercial Historic District |
| Opp Cottage |
| Ordeman-Shaw Historic District |
| Orlando Apartments |
| Orrell House |
| Otey, William Madison, House |
| Overton Farm |
| Owen Plantation House |
| Oxford Railway Depot |
| Palmerdale Homesteads Historic District |
| Park and Bandstand |
| Parker Memorial Baptist Church |
| Parker-Reynolds House |
| Pastorium, Dexter Avenue Baptist Church |
| Paterson House |
| Paterson, J. E., House |
| Patton, Dave, House |
| Patton, Gov. Robert, House |
| Payne House |
| Peerless Saloon |
| Pell City Downtown Historic District |
| People's Supply Company |
| Pepperell Mill and Mill Village Historic District |
| Pepperman House |
| Perkins, William, House |
| Perry Street Historic District |
| Petty-Roberts-Beatty House |
| Pfau-Creighton Cottage |
| Phelan Park Historic District |
| Phelps-Jones House |
| Phenix City Post Office Building |
| Phillipi House |
| Phillips Memorial Auditorium |
| Pickens County Courthouse |
| Pierce, William F., House |
| Pincus Building |
| Pine Apple Historic District |
| Pinehurst Historic District |
| Pinson Hills Historic District |
| Pinson Main Street Historic District |
| Pippen, Littleberry, House |
| Pitts' Folly |
| Pitts, Samuel R., Plantation |
| Plattenburg, Wesley, House |
| Pleasant Hill Presbyterian Church |
| Point Clear Historic District |
| Poole, William, House |
| Post Office Historic District |
| Powell Avenue Steam Plant |
| Powell School |
| Pratt City Carline Historic District |
| Pratt School |
| President's House, Marion Institute |
| President's Mansion |
| President's Mansion, Old |
| Presley Store |
| Preuit Oaks |
| Protestant Children's Home |
| Pugh, Jesse Pickens, Farmstead |
| Purcell-Killingsworth House |
| Quayle, Margaret, Lustron House |
| Queen City Pool and Pool House |
| Quinlan Castle |
| Railroad Avenue Historic District |
| Ramsay-McCormack Building |
| Rand Building |
| Randolph Street Church of Christ |
| Rather, John Daniel, House |
| Rawls Hotel |
| Red Mountain Suburbs Historic District |
| Reed, William, House |
| Reese, Edwin, House |
| Rhea-McEntire House |
| Rhodes Park |
| Rice, Green Pryor, House |
| Ridgely Apartments |
| Riverdale |
| Riverview Historic District |
| Roanoke Downtown Historic District |
| Robert Beaty Historic District |
| Roberts House |
| Robinson, John, House |
| Robinson, Judge Elisha, House |
| Robinson, Mrs. William, House |
| Robinson Springs United Methodist Church |
| Rock House, Old |
| Roebuck Springs Historic District |
| Rogers Department Store |
Data from United States Park Service and Wikidata
