Indiana - Role: Building
| Sid-Mar |
| Siegel's Department Store |
| Sigler, Eli, House |
| Simonson, Alfred, House |
| Simpson-Breedlove House |
| Simpson Memorial United Methodist Church |
| Skinner, DeForest, House |
| Smith, Everel S., House |
| Smith, Henry W., House |
| Smith, John W., House |
| Smith, Robert, Mortuary |
| Smith, Samuel G., Farm |
| Soldiers and Sailors Memorial Coliseum |
| Solomon Enclave |
| Sommer, August, House |
| Sommerer House |
| Sons of Israel Synagogue |
| Souder, Dr. Christopher, House |
| South Bend Brewing Association |
| South Bend Remedy Company |
| South Bend Remedy Company Building |
| Southern Indiana Railroad Freighthouse |
| South Grade School Building |
| South Milford I.O.O.F. Hall |
| Southmoor Apartment Hotel |
| Southport High School, Old |
| South Side Turnverein Hall |
| Spencer County Courthouse |
| Spencer Presbyterian Church and Manse |
| Spencer Public Library |
| Spencer Town Hall and Fire Station |
| Spencerville Covered Bridge |
| Spink |
| Spink Arms Hotel |
| Spring Street Freight House |
| St. Adalbert Church Complex |
| Stallbohm Barn-Kaske House |
| Star Building |
| Starke County Courthouse |
| State Bank of Hammond Building |
| State Bank of Indiana, Branch of (Memorial Hall) |
| State Normal Library |
| State Soldiers and Sailors Monument |
| St. Augustine's Episcopal Church |
| St. Boniface Church |
| Steele, T.C., Boyhood Home |
| Steele, Theodore Clement, House and Studio |
| Stephenson, Joseph W. and Edith M., House |
| Stephenson Underwear Mill |
| Steuben County Courthouse |
| Steuben County Jail |
| Stevens, Levi, House |
| Stewart Manor (Charles B. Sommers House) |
| Stewart-Studebaker House |
| St. George Lutheran Church |
| Stidham United Methodist Church |
| Stipp-Bender Farm |
| St. James Memorial Chapel |
| St. John of the Cross Episcopal Church, Rectory and Cemetery |
| St. John's Church and Rectory |
| St. John's Episcopal Church |
| St. John's Evangelical Protestant Church |
| St. John's Lutheran Church |
| St. John's Lutheran Church and School |
| St. Joseph Catholic Church |
| St. Joseph County Infirmary |
| St. Joseph Indian Normal School |
| St. Joseph School |
| St. Joseph’s Parish Square |
| St. Luke's Episcopal Church |
| St. Mary's Catholic Church |
| Stockdale Mill |
| Stonebraker, John & Caroline, House |
| Stone, Gen. Asahel, Mansion |
| Stone, Judge Earl S., House |
| Stoner, Lycurgus, House |
| Stone's Trace |
| Stout, Daniel, House |
| Stout Field, Administration Building |
| Stout Field, Hangar |
| St. Patrick's Roman Catholic Church |
| St. Paul Methodist Episcopal Church |
| Straber Ford Bridge |
| Straus, Jacob, House |
| St. Rose de Lima Roman Catholic Church and Rectory |
| Strunz, Christian G., House |
| St. Stephen's African Methodist Episcopal Church |
| St. Timothy’s Episcopal Church |
| Studebaker Clubhouse and Tree Sign |
| Stultz-Stanley House |
| Stumpf, George, House |
| Sturm, Louis H., Hardware Store |
| Stutz Motor Car Company Factory |
| Sugar Grove Meetinghouse and Cemetery |
| Sullivan County Courthouse |
| Sullivan County Poor Home |
| Summers-Longley House-Building |
| Sunset Park Pavilion |
| Sutton, Dr. George, Medical Office Building |
| Swayzee, Aaron, House |
Data from United States Park Service and Wikidata
