Indiana - Criteria: A (event)
| Pipe Creek Falls Resort |
| Plainfield Historic District |
| Plaza |
| Pleak, Strauther, Round Barn |
| Pleasant Hill Church |
| Pleasant Lake Depot |
| Pleasanton in Irvington Historic District |
| Plymouth Downtown Historic District |
| Plymouth Fire Station |
| Plymouth Northside 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 Pool Bathhouse |
| Porter Town Hall |
| Portland Commercial Historic District |
| Portland Mills Bridge |
| Posey County Courthouse Square |
| Potter's Covered Bridge |
| Pound, John, Store |
| Prill School |
| Proctor, William, House |
| Propylaeum, The (John W. Schmidt House) |
| Pugh Ford Bridge |
| Pulaski County Courthouse |
| Pulaski County Home |
| Pullman-Standard Historic District |
| Puterbaugh, Joseph and Sarah, Farm |
| Putnam County Bridge No. 159 |
| Putnamville Presbyterian Church |
| Raber, Fred and Minnie, Farm |
| Ralph Waldo Emerson Indianapolis Public School #58 |
| Ramsay-Fox Round Barn and Farm |
| Randolph County Infirmary |
| Rangeline Road Bridge |
| Rankin, Alexander Taylor, House |
| Rankin, Rebecca, Round Barn |
| Ransom Place Historic District |
| Read Dunes House |
| Redkey Historic District |
| Reeves, Jabez, Farmstead |
| Remington Water Tower and Town Hall |
| Rensselaer Carnegie Library |
| Rensselaer Courthouse Square Historic District |
| Reserve Loan Life Insurance Company |
| Richland-Plummer Creek Covered Bridge |
| Richmond Downtown Historic District |
| Richmond High School |
| Richmond Railroad Station Historic District |
| Richsquare Friends Meetinghouse and Cemetery |
| Richwood Evangelical Lutheran Church |
| Ridgeway, Marion, Polygonal Barn |
| Rink |
| Rink's Womens Apparel Store |
| Ripley County Courthouse |
| Rising Sun Historic District |
| Riverside Historic District |
| River View Cemetery |
| Rivoli Theater |
| Roads Hotel |
| Roann Historic District |
| Roann-Paw Paw Township Public Library |
| Roberts Chapel |
| Roberts Park |
| Rochester Downtown Historic District |
| Rockville Chautauqua Pavilion |
| Rockville Historic District |
| Rohrer, Joseph J., Farm |
| Roosevelt, Theodore, High School |
| Roots, Francis T., Building |
| Roselawn-Forest Heights Historic District |
| Rosenberger Building |
| Roseville Bridge |
| Ross, John, Farm |
| Rudicel, George, Polygonal Barn |
| Rush County Bridge No. 188 |
| Rush Creek Bridge |
| Rushville Commercial Historic District |
| Saint John's Episcopal Church |
| Salem Downtown Historic District |
| Savoy |
| Schnull-Rauch House |
| Scotland Hotel |
| Scott County Home |
| Scottsburg Courthouse Square Historic District |
| Scottsburg Depot |
| Scott Street Pavilion |
| Second Baptist Church |
| Second St. Joseph Hotel |
| Secrest Ferry Bridge |
| Selig's Dry Goods Company Building |
| Seller's Standard Station and Pullman Diner |
| Selmer, H. & A., Inc. Factory |
| Seminary Square Park |
| Senour, Frank, Round Barn |
| Seymour Commercial Historic District |
Data from United States Park Service and Wikidata
