All - Architectural style - Colonial Revival architecture
| Southern Biscuit Company |
| Southern Counties Gas Co. |
| Southern Pacific Depot |
| Southern Railway Freight Station |
| Southport High School, Old |
| South Providence Branch-Providence Public Library |
| Spain House |
| Spanish Governor's Palace |
| Sparks Hall |
| Spencer, Arthur Champlin, and Margaret Fenton Spencer House |
| Spencer Carriage House and Stable |
| Spencer House |
| Spencer House |
| Spencer-Penn School |
| Sperling, George, House and Outbuildings |
| Sperry-Smith House |
| Sprague, David R. and Ellsworth A., Houses |
| Spring Brook House |
| Springdale |
| Spring Hill |
| Springwells Park Historic District |
| Springwood Manor |
| Spruce Creek Rod and Gun Club |
| Spur House |
| Square 1500 |
| Stacy, George O., House |
| St. Agnes Catholic Church |
| St. Albans Post Office |
| St. Aloysius-on-the-Ohio |
| St. Andre's Parish |
| St. Andrews Evangelical German Lutheran Church |
| Star of the Sea Church-Kalapana Painted Church |
| St. Augustine's Episcopal Church Complex |
| St. Bonaventure Church Complex |
| St. Christopher's School |
| St. Clair Hospital |
| Steam Engine Company No. 21 |
| Stebbins, Edward N. and Mary T., House |
| Steep Falls Library |
| Stevens Building |
| Stevens, Wayland H. and Mamie Burt, House |
| Stewart House |
| St. Gabriel's Catholic Parish Complex |
| St. George's Church |
| Still Hopes |
| Stimson Memorial Hall |
| Stitzel, Arthur P., House |
| St. James AME Church |
| St. John Catholic Church |
| St. John's AF & AM Lodge |
| St. John's Church |
| St. Joseph's Convent and School |
| St. Joseph's Home for the Aged |
| St. Louis Colored Orphans Home |
| St. Mary's Catholic Church Historic District |
| St. Mary's Church Complex Historic District |
| St. Mary's Parochial School |
| St. Nicholas Historic District |
| Stockton-Montmorency |
| Stockton School |
| Stoddard, Jessie W., House |
| Stokes, Fremont, House |
| Stoliker, Edna, Three-Decker |
| Stone, William, House |
| Stonyfield Farm |
| Stony Hill School |
| Story Grammar School |
| Stout House |
| Stout, Isaac, House |
| Stout, John, House |
| St. Peter's Roman Catholic Church |
| Straight, Charles E., House |
| Stratton, Edward B., House |
| Strauss House |
| Strong, George A., House |
| Strong, Hattie M., Residence Hall |
| Strongman, William, House |
| Strong's Block |
| Stroud House |
| Stubbs-Ballah House |
| Stuckman Cottage |
| Students' Hall |
| Students House |
| Sturdivant-Sawyer House |
| Sturtevant Hall |
| Stuyvesant Hall |
| Suffolk County Historical Society Building |
| Sullivan, G. H., Lodging House |
| Sullivan House |
| Sumner, Charles, High School |
| Sunbury High School |
| Sunnycroft |
| Sunset Hill |
| Superintendent's House |
| Superintendent's Residence at the Utah State Hospital |
| Superior School |
| Sutton, Warner P., House |
| Swearingen, John J., House |
| Sweat-Comings Company House |
| Sweetser Residence |
Data from United States Park Service and Wikidata
