Indiana - Significance region: Local
| Place, Willard B., House |
| Plainfield Historic District |
| Plaza |
| Pleasant Hill Church |
| Pleasant Lake Depot |
| Pleasanton in Irvington Historic District |
| Pletcher, Richard and Susan, House |
| Plum Prairie Residential Historic District |
| Plymouth Downtown Historic District |
| Plymouth Fire Station |
| Plymouth Northside Historic District |
| Plymouth Southside Historic District |
| Point Historic District |
| Pokagon State Park |
| Poland Presbyterian Church and Cemetery |
| Polk Street Concrete Cottage Historic District |
| Polk Street Terraces Historic District |
| Polk Township District No. 2 School |
| Porter County Jail and Sheriff's House |
| Porter County Memorial Hall |
| Porter Pool Bathhouse |
| Porter Town Hall |
| Portland Commercial Historic District |
| Potter, William, House |
| Pound, John, Store |
| Presbyterian Church Building |
| Prill School |
| Princess Theatre |
| Princeton Courthouse Square Historic District |
| Princeton Westside Historic District |
| P.R. Mallory Company Factory Historic District |
| Proctor, William, House |
| Prospect Hill Historic District |
| Pryor's Country Place |
| Pugh Ford Bridge |
| Pulaski County Courthouse |
| Pulaski County Home |
| Pullman-Standard Historic District |
| Purviance, David Alonzo and Elizabeth, House |
| Purviance, Samuel, House |
| Puster, L., and Company Furniture Manufactory |
| Puterbaugh, Joseph and Sarah, Farm |
| Putnam County Bridge No. 159 |
| 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 |
| Randall Building |
| Rand, John Linsey, House |
| Randolph County Infirmary |
| Rangeline Road Bridge |
| Rank, Hugh and Leona, House |
| Ransom Place Historic District |
| Rea Park |
| Recker, Carlos and Anne, House |
| Redkey Historic District |
| Reeves, Jabez, Farmstead |
| Reeves, Jane Ross, Octagon House |
| Reeveston Place Historic District |
| Remington Water Tower and Town Hall |
| Rensselaer Carnegie Library |
| Rensselaer Courthouse Square Historic District |
| Reserve Loan Life Insurance Company |
| Reynolds, James Culbertson, House |
| Richmond Downtown Historic District |
| Richmond Railroad Station Historic District |
| Richsquare Friends Meetinghouse and Cemetery |
| Richwood Evangelical Lutheran Church |
| Rickenbaugh House |
| Ridgway Building |
| Rink |
| Rink's Womens Apparel Store |
| Ripley County Courthouse |
| Riverside Drive Historic District |
| Riverside Historic District |
| Riverside Historic District |
| Rivoli Theater |
| Roachdale Historic District |
| Roads Hotel |
| Roann Covered Bridge, 4th |
| Roann Historic District |
| Roann-Paw Paw Township Public Library |
| Roberts Chapel |
| Roberts Hotel |
| Roberts Park |
| Roberts Park Methodist Episcopal Church |
| Robinson, Horney, House |
| Rob Roy Covered Bridge |
| Rochester Downtown Historic District |
| Rockport Historic District |
| Rockville Chautauqua Pavilion |
| Rockville Historic District |
| Rocky Edge |
| Roelker, John H., House |
| Rohrer, Joseph J., Farm |
| Rolling Stone Covered Bridge |
| Roosevelt, Theodore, High School |
| Roots, Francis T., Building |
Data from United States Park Service and Wikidata
