Louisiana - Criteria: C (architecture/engineering)
| Reiley-Reeves House |
| Residence Plantation House |
| Reymond House |
| Rice House |
| Riche, Fannie, House |
| Richland Plantation |
| Rienzi Plantation House |
| Riverlake |
| Rivet, Pierre Ernest, House |
| Riviere Building |
| Riviere House |
| Robeline Methodist Church |
| Roberts, Earl, House |
| Robichaux House |
| Robin House |
| Robin House and Barn |
| Rome House |
| Romero, Andrew, House |
| Rosale Plantation |
| Rosalie Plantation Sugar Mill |
| Rosebank Plantation House |
| Rose Cottage |
| Rosedown Plantation |
| Roseland |
| Roseland Terrace Historic District |
| Roseneath |
| Roumain Building |
| Roy, J. Arthur, House |
| Roy-LeBlanc House |
| Rugg Elementary School |
| Ruston High School |
| Ruston State Bank |
| Sabine Pass Lighthouse |
| Saenger Theatre |
| Saint Joseph Abbey Church |
| Saint Joseph Abbey Refectory |
| Saint Joseph's Co-Cathedral and Rectory |
| Saizon House |
| Salmen, Albert, House |
| Salmen House |
| Samson House |
| San Francisco Plantation House |
| Santa Maria Plantation House |
| Sardy House |
| Sargent House |
| Sarto Bridge |
| Schnack, C.A., Jewelry Co. Store |
| Scottish Rite Cathedral |
| Scottland Plantation House |
| Scott, Thomas, House |
| Sebastopol Plantation House |
| Shades, The |
| Shadows-on-the-Teche |
| Shell Building |
| Shepis Building |
| Shreveport Fire Station #8 |
| Shreveport Municipal Building |
| Shreveport Municipal Memorial Auditorium |
| Shreveport Water Works Company, Pump Station |
| Shreveport Woman's Department Club Building |
| Silliman Institute |
| Simms-Ellis House |
| Sincer, Louis, House |
| Sister Stanislaus Memorial Building |
| Slagle House |
| Smart, Edmond Ellison, House |
| Smith, Clifford Percival, House |
| Smithfield Plantation House |
| Smith House |
| Snyder House |
| Solitude Plantation House |
| Sommerville-Kearney House |
| Sorapuru House |
| Soulier House |
| Southern University Archives Building |
| South Highlands Fire Station |
| Southwest Reef Lighthouse |
| Spanish Town |
| Sparrow Lane Bridge |
| Spell House |
| Spring Ridge Baptist Church |
| Stage Coach Inn |
| St. Alphonsus Church |
| Standard Coffee Company Warehouse and Factory |
| St. Andrew's Episcopal Church |
| St. Anne Catholic Church |
| Star Hill Plantation Dependency |
| Starvation Point |
| St. Basil's Academy |
| St. Bernard Market |
| St. Cecilia School |
| St. David's Episcopal Church |
| Steamboat House |
| Steere, A. C., Elementary School |
| Stein, Daniel, House |
| St. Elizabeth Catholic Church |
| St. Emma |
| Stephanie Plantation House |
| Sterling Grove Historic District |
| Stevenson House |
Data from United States Park Service and Wikidata
