All - Constructed - 1890–1899
| Rains, John P., Hotel |
| Randolph Tabernacle |
| Rankin Building |
| Rankin Octagonal Barn |
| Ransom Water Tower |
| Raventhorp |
| Rawson, Warren, Building |
| Ray, Frank G., House & Carriage House |
| Reading Municipal Light and Power Station |
| Reading Standpipe |
| Reading Terminal and Trainshed |
| Reasoner, Egbert, House |
| Red Bridge |
| Redman House |
| Reedsburg Woolen Mill Office |
| Reedy, J. W., House |
| Reliance Building |
| Renaissance Apartments |
| Residence Plantation House |
| Review Building |
| Reynolds, Anson O., House |
| Reynolds House |
| Reynolds, James E., House |
| Rice-Gates House |
| Rice, John C., House |
| Richland Hall |
| Rider-Pugh House |
| Riekenberg, J. H., House |
| Riggert, William, House |
| Riley Creek Bridge |
| Ringgold County Jail |
| Ririe A Pegram Truss Railroad Bridge |
| Risum Round Barn |
| Ritchie Block |
| River Side Farmhouse |
| Riverside Iron Works Office Building |
| River Street Firehouse |
| Robbins, Nathaniel and Esther (Savidge), House |
| Robbins, Wendell P. and Harriet Rounds, House |
| Roberts, John N., House |
| Roberts, Morris, Store |
| Robertson, John A. and Martha, House |
| Robertson, John, Jr., House |
| Robertson Quarry Galamander |
| Robichaux House |
| Rock Creek Park Historic District |
| Roddy Road Covered Bridge |
| Rodgers, Moses, House |
| Roe, Ole K., House |
| Roesler House |
| Rollinsford Town Hall |
| Roome-Stearns House |
| Root-Badger House |
| Ropes End |
| Rose, Adolph, Building |
| Rosedale Plantation |
| Ross Building |
| Rosson, Dr. Roland Lee, House |
| Roughan Hall |
| Round Island Lighthouse |
| Roup, Barna C., House |
| Rowan County Courthouse |
| Roxbury Presbyterian Church |
| Roycroft Campus |
| Roynane, Catharine, Three-Decker |
| Russell, Arthur H., House |
| Russell Common |
| Ryan House and Lost Horse Well |
| Ryman Auditorium |
| Sacred Heart Cathedral, Sacred Heart School and Christian Brothers (Boundary Increase) |
| Sacred Heart Catholic Church and Rectory |
| Sacred Heart Church |
| Sacred Heart of Jesus Churches |
| Sacred Heart Parish Complex |
| Sacred Heart Roman Catholic Cathedral Complex |
| Safety Fund National Bank |
| Sagamore |
| Saint Helena Southern Pacific Railroad Depot |
| Saint Ignatius Loyola Church |
| Saint John's Episcopal Church |
| Saint John the Evangelist Catholic Church Complex |
| Saint Joseph Parish Complex |
| Saint Joseph's Roman Catholic College for Boys |
| Saint Paul Catholic Church Complex |
| Saints Peter and Paul Roman Catholic Church Historic District |
| Saint Stanislaus Roman Catholic Church Complex |
| Saitta House |
| Salsbury Row House |
| Salt Lake City and County Building |
| Saltus Grocery Store |
| San Luis Obispo Light Station |
| Santa Fe Passenger Depot |
| Sarvis Fork Covered Bridge |
| Saturday Club |
| Sayre Street School |
| Schaeffer, Michael, House |
| Schendel, Reinhard and Amelia, House |
| Scherck, R. T., House |
| Schermerhorn, Edgar Backus, House |
| Schneider, Charles W., House |
Data from United States Park Service and Wikidata
