Indiana - Area of significance: Architecture
| Polk Street Terraces Historic District |
| Polk Township District No. 2 School |
| Pollard-Nelson House |
| Porter County Jail and Sheriff's House |
| Porter County Memorial Hall |
| Porter, Gene Stratton, Cabin |
| Porter, Gene Stratton, Cabin |
| Porter Pool Bathhouse |
| Porter Town Hall |
| Portland Commercial Historic District |
| Posey County Courthouse Square |
| Potter, William, House |
| Pound, John, Store |
| Presbyterian Church Building |
| Princess Theatre |
| Princeton Courthouse Square Historic District |
| Princeton Westside Historic District |
| Proctor, William, House |
| Propylaeum, The (John W. Schmidt House) |
| Prospect Hill Historic District |
| Prosser House |
| Pryor's Country Place |
| Pulaski County Courthouse |
| Pullman-Standard Historic District |
| Purviance, David Alonzo and Elizabeth, House |
| Purviance, Samuel, House |
| Puster, L., and Company Furniture Manufactory |
| Puterbaugh, Joseph and Sarah, Farm |
| Putnamville Presbyterian Church |
| Raber, Fred and Minnie, Farm |
| Ragsdale, William A., House |
| Rakestraw House |
| Ralph Waldo Emerson Indianapolis Public School #58 |
| Ramsay-Fox Round Barn and Farm |
| Ranck, Thomas, Round Barn |
| Randall Building |
| Rand, John Linsey, House |
| Randolph County Infirmary |
| Rank, Hugh and Leona, House |
| Rankin, Rebecca, Round Barn |
| Read Dunes House |
| Rea Park |
| Recker, Carlos and Anne, House |
| Redkey Historic District |
| Reeves, Jabez, Farmstead |
| Reeves, Jane Ross, Octagon House |
| Reeveston Place Historic District |
| Reitz, John Augustus, House |
| Rensselaer Carnegie Library |
| Rensselaer Courthouse Square Historic District |
| Reserve Loan Life Insurance Company |
| Reynolds, James Culbertson, House |
| Richmond Downtown Historic District |
| Richmond High School |
| Richmond Railroad Station Historic District |
| Richsquare Friends Meetinghouse and Cemetery |
| Richwood Evangelical Lutheran Church |
| Rickenbaugh House |
| Ridgeway, Marion, Polygonal Barn |
| Ridgway Building |
| Rink |
| Rink's Womens Apparel Store |
| Ripley County Courthouse |
| Rising Sun Historic District |
| Riverside Drive Historic District |
| Riverside Historic District |
| Riverside Historic District |
| Riverside Historic District |
| River View Cemetery |
| Rivoli Theater |
| Roachdale Historic District |
| Roads Hotel |
| Roann Historic District |
| Roann-Paw Paw Township Public Library |
| Roberts Hotel |
| Roberts-Morton House |
| Roberts Park |
| Roberts Park Methodist Episcopal Church |
| Robinson, Horney, House |
| Rochester Downtown Historic District |
| Rockport Historic District |
| Rockville Historic District |
| Rocky Edge |
| Rohrer, Joseph J., Farm |
| Roosevelt, Theodore, High School |
| Roots, Francis T., Building |
| Rose, David Garland, House |
| Rose, F.D., Building |
| Roselawn-Forest Heights Historic District |
| Rosenberger Building |
| Rose Terrace |
| Rudicel, George, Polygonal Barn |
| Rumsey, J. Claude, House |
| Rush County Courthouse |
| Rushville Commercial Historic District |
| Russellville Historic District |
| Russiaville Interurban Depot |
| Sablotny, Barney, House |
| Sage-Robinson-Nagel House |
| Saint James Court |
Data from United States Park Service and Wikidata
