All - Constructed - 1890–1899
| St. Francis DeSales Roman Catholic Church |
| St. Francis Xavier Cathedral |
| St. Francis Xavier Church |
| St. George Reef Light Station |
| St. George's School-Church of St. George, Little Chapel, and Memorial Schoolhouse |
| St. Helena High School |
| St. John of God Roman Catholic Church, Convent, and School |
| St. John's Episcopal Church |
| St. John's Methodist Episcopal Church |
| St. Josaphat's Roman Catholic Church Complex |
| St. Joseph Catholic Church and School |
| St. Joseph County Courthouse |
| St. Joseph's Catholic Church |
| St. Joseph's Chapel |
| St. Joseph's Episcopal Church |
| St. Joseph's Industrial School |
| St. Lawrence Catholic Church |
| St. Louis, Peoria and Northern Railroad Depot |
| St. Louis Union Station |
| St. Lucas Evangelical German Lutheran Church and Cemetery |
| St. Luke's and St. Margaret's Church |
| St. Luke's Episcopal Church |
| St. Luke's Protestant Episcopal Church |
| St. Mark's Episcopal Church |
| St. Mary's Cathedral, Chapel, and Diocesan House |
| St. Mary's Catholic Church |
| St. Mary's Catholic Church |
| St. Mary's Church |
| St. Nicholas Russian Orthodox Church |
| Stokes Castle |
| Stolte, William, Jr., House |
| Stoutimore, David L. and Sallie Ann, House |
| St. Patrick's Catholic Church |
| St. Patrick's Catholic Church and Rectory |
| St. Patrick's Roman Catholic Church |
| St. Paul's Catholic Church |
| St. Paul's Catholic Church |
| St. Paul's (Zion's) Evangelical Lutheran Church |
| St. Peter's and St. Joseph's Catholic Churches |
| St. Peter's Episcopal Church |
| St. Peter's Roman Catholic Church |
| St. Philip's Episcopal Church |
| St. Philip's Episcopal Church |
| Stratton's Independence Mine and Mill |
| Strimple's Mill Road Bridge over Lockatong Creek |
| Strong, George A., House |
| Strong's Block |
| Stroud, James W., House |
| St. Stanislaus Church Historic District |
| St. Stephen's Methodist Church |
| Stuart, Dr. Richard and Paulina, House |
| Sturgeon Bay Canal Lighthouse |
| St. Wenceslaus Catholic Church and Parish House |
| Sullivan, Cornelius, House |
| Sullivan County Courthouse |
| Sullivan, Joseph P. O., House |
| Sullivan-Kinney House |
| Sumpter Valley Railway Historic District |
| Sunfield Grand Army of the Republic Post No. 283 Hall |
| Sunnyside Hotel |
| Svea Land Company Office |
| Svenska Mission Kyrka i Sodre Maple Ridge |
| Swedenborgian Church |
| Swedish Evangelical Lutheran Augustana Church |
| Swedish Lutheran Church |
| Sweed, Philip, House |
| Swift County Courthouse |
| Swift House |
| Talbot County Courthouse |
| Tannehill, Capt. James Boggs, House |
| Tanner, Albert H., House |
| Tansill, Rober Weems and Mary E., House |
| Tarrant County Courthouse |
| Taylor, Arthur, House |
| Taylor, Arthur, House |
| Taylor, Col. Robert Z., House |
| Taylor-Dallin House |
| Taylor House |
| Tears-McFarlane House |
| Temple, Marcellus Luther and Julia Protzman, House |
| Terrell County Courthouse |
| Tevis Block |
| Thayer Hotel |
| The Karnak Flats |
| The Rae Flats and The Raleigh |
| Thompson, Erick J., House |
| Thompson Hall |
| Thorne, George R., House |
| Thorne, W. T., Building |
| Thunborg, Jacob and Cristina, House |
| Thurston Building |
| Ticknor Hall |
| Tillery-Fries House |
| Todd, Edwin, House |
| Tome School for Boys Historic District |
| Tompkins Corners United Methodist Church |
| Tongue Point Lighthouse |
| Torrey Log Church-Schoolhouse |
| Town of Potomac |
| Tracy City Hall and Jail |
Data from United States Park Service and Wikidata
