All - Architectural style - Romanesque Revival architecture
| Sandstone School |
| Sandusky County Jail and Sheriff's House |
| Sanford Grammar School |
| San Luis Obispo Carnegie Library |
| Saunders School |
| Savoy |
| Scarlet Oaks |
| Schiffman Building |
| Schlee-Kemmler Building |
| Schley County Courthouse |
| Schmidt Block |
| Schmitz Block |
| Schnull-Rauch House |
| Schuyler Grade School |
| Science Hall |
| Scimitar Building |
| Scottish Rite Temple |
| Scottville School |
| Scoville Memorial Library |
| Scoville Memorial Library-Carleton College |
| Scranton Armory |
| Scribner Town Hall |
| Sears, Joshua, Building |
| Second Baptist Church |
| Second Baptist Church |
| Second Baptist Church |
| Second Presbyterian Church |
| Second Street Christian Church |
| Security Savings Bank |
| Security State Bank |
| Seiberling Mansion |
| Sengelmann Hall and City Meat Market Building |
| Seth Richards Commercial Block |
| Seven Dolors Catholic Church |
| Sever Hall, Harvard University |
| Shadyside Presbyterian Church |
| Sharon Lodge No. 28 IOOF |
| Shaw Junior High School |
| Sheedy Mansion |
| Sheridan County Courthouse |
| Sherman Free Library |
| Shove Memorial Chapel |
| Shrine of Our Lady of Sorrows |
| Silliman Memorial Presbyterian Church |
| Simmons Hardware Company Warehouse |
| Simpson Street School |
| Simpsonville Baptist Church |
| Sioux County Courthouse |
| Sixth Church of Christ, Scientist |
| Skattaboe Block |
| Skowhegan Fire Station |
| Slater, John Fox, Elementary School |
| Slater Library and Fanning Annex |
| Smith, A. Herr and E. E., Public Library |
| Smith, C. L., & Son General Store |
| Smith, Fleming, Warehouse |
| Smith, J. Harper, Mansion |
| Smith's Building |
| Smithson and McKay Brothers Blocks |
| Smithsonian Building |
| Smith Warehouse |
| Smyth, Dennis A., House |
| Society of the Congregational Church of Great Barrington |
| Sohmer and Company Piano Factory |
| Somerset Hotel |
| Somervell County Courthouse |
| Sons of Israel Synagogue |
| Soo Line Depot |
| Southbridge Town Hall |
| South Congregational Church |
| South Dakota School for the Deaf |
| Southern District Police Station |
| Southern Pacific Depot |
| South Milwaukee Passenger Station |
| South Side School |
| South Unitarian |
| Southwestern Telegraph and Telephone Building |
| Southwestern University Administration Building and Mood Hall |
| Spencerport Methodist Church |
| Spencer Town Hall and Fire Station |
| Spokane, Portland and Seattle Railroad Warehouse |
| Spori, Jacob, Building |
| St. Adalbert Polish Catholic Church |
| St. Albans Town Hall |
| St. Ambrose Cathedral and Rectory |
| St. Anne Church |
| Stanstead, The |
| St. Anthony de Padua Parish School |
| St. Anthony's Church and School |
| St. Anthony's Roman Catholic Church |
| St. Anthony's Roman Catholic Church |
| Starke County Courthouse |
| Starkweather Religious Center |
| State Bank of Edinburg |
| State Quarry, Iowa Men's Reformatory |
| State Savings Bank |
| State Street A.M.E. Zion Church |
| State Street Methodist Episcopal Church |
| St. Augustine Catholic Church and Cemetery |
| St. Augustine Church |
Data from United States Park Service and Wikidata
