All - Architectural style - Greek Revival architecture
| Powers, Isaac M., House |
| Poweshiek County Courthouse |
| Powhatan Courthouse Historic District |
| Powhatan House |
| Prairie Spring Hotel |
| Pratt-McDaniels-LaFlamme HOuse |
| Pratt, Stillman, House |
| Pratt, Zadock, House |
| Pray-Starkweather House |
| Prentiss-Payson House |
| Prentiss, William, House |
| Presbyterian Church |
| Presbyterian Church in Basking Ridge |
| Presbyterian Manse |
| Presbyterian Orphans Home |
| Presbyterian Parsonage |
| Prescott, Gustavus G., House |
| President's House |
| President's Mansion |
| Pressey House |
| Pressley, Colonel John Gotea, House |
| Preston House |
| Preston House |
| Preston House |
| Prewitt, Levi, House |
| Price, Bushrod Washington, House |
| Price, Gov. Samuel, House |
| Prices Fork Historic District |
| Prien Building |
| Priestly House |
| Primitive Baptist Church of Sweeten's Cove |
| Prince, Cushing and Hannah, House |
| Printz, Abram and Sallie, Farm |
| Proctor, George N., House |
| Prospect House |
| Prouty, Jed, Tavern and Inn |
| Providence-Biltmore Hotel |
| Providence Church |
| Pruyn, Casparus F., House |
| Pugh-Boykin House |
| Pugh, Francis, House |
| Pulver-Bird, House |
| Purefoy-Chappell House and Outbuildings |
| Purnell, George Washington, House |
| Purnell, James C., House |
| Putnam, Blackhawk, Tavern |
| Putnam County Courthouse |
| Putnamville Presbyterian Church |
| Qhandlery Corner |
| Quaker Street Historic District |
| Quay, Rev. Anderson B., House |
| Quincy Grammar School |
| Quincy Market |
| Quincy Town Hall |
| Quinnipiac River Historic District |
| Raemelton Farm Historic District |
| Ragersville School |
| Ragsdale-Jackman-Yarbough House |
| Raible, F. J., House |
| Raiford, Robert, Home and Farm |
| Rail and Titsworth Canal Warehouse |
| Railroad Borough Historic District |
| Railroad Hotel |
| Raines-Carmichael House |
| Ralls County Courthouse and Jail-Sheriff's House |
| Ramsdell, Z. D., House |
| Ramsey, J. Sylvester, School |
| Ramsey, Justus, Stone House |
| Randall-Hildreth House |
| Randolph Historic District |
| Randolph-Whittle House |
| Raney, David G., House |
| Rankin, Alexander Taylor, House |
| Rankin Block |
| Rankin-Harwell House |
| Rankin, John, House |
| Rankin-Sherrill House |
| Rannells, Charles S. and Mary Warder, House |
| Ransom House |
| Raplee, Miles, House |
| Rattle and Snap |
| Ravenna |
| Ravenswood |
| "Ravenswood ""Old Town"" Historic District" |
| Rawlings-Brownell House |
| Rawlins, Capt. R. A., House |
| Rayen School |
| Raymond Historic District |
| Raymond, Tilley, House |
| Rayner, Eli, House |
| Ray-Wakefield House |
| Read, Cheney, House |
| Read, Nathan, House |
| Read School |
| Rebel Hall |
| Reber, Frederick and Anna Maria, House |
| Record, E.C. and M.I., Homestead |
| Rector, Jason and Elizabeth Baylor, House |
| Rectortown Historic District |
| Red Clay Creek Presbyterian Church |
Data from United States Park Service and Wikidata
