Indiana - Criteria: C (architecture/engineering)
| St. Patrick's Farm |
| St. Patrick's Roman Catholic Church |
| St. Paul Methodist Episcopal Church |
| St. Peter's Square |
| St. Philip Neri Parish Historic District |
| Straber Ford Bridge |
| Straus, Jacob, House |
| Strunz, Christian G., House |
| Studebaker Clubhouse and Tree Sign |
| Stumpf, George, House |
| Sturm, Louis H., Hardware Store |
| St. Vincent Villa Historic District |
| Sugar Grove Meetinghouse and Cemetery |
| Sullivan County Courthouse |
| Sullivan County Poor Home |
| Summers-Longley House-Building |
| Sunken Gardens |
| Sunset Park Pavilion |
| Sutton, Dr. George, Medical Office Building |
| Swayzee, Aaron, House |
| Sweeton, Charles, House |
| Swinney, Thomas W., House |
| Switzerland County Courthouse |
| Sylvania |
| Taggart, F.P., Store |
| Tate, George and Helen, House |
| Taylor Carpet Company Building |
| Taylor, Fernando G., House |
| Taylor-Zent House |
| Teague Barn Wabash Importing Company Farm Stable |
| Temple Israel |
| Tepicon Hall |
| Terminal Arcade |
| Terre Haute Fire Station No. 8 |
| Terre Haute Masonic Temple |
| Terre Haute Post Office and Federal Building |
| Territorial Capitol of Former Indiana Territory |
| Test Building |
| Thawley, Joseph & Lucinda, House |
| The Buckingham |
| The Republic |
| THI and E Interurban Depot-Substation |
| Thiebaud Farmstead |
| Third St. Joseph County Courthouse |
| Thomas, Amon Clarence, House |
| Thomas, Andrew, House |
| Thompson, Dr. George W., House |
| Thompson-Ray House |
| Thornhurst Addition |
| Thorpe Ford Bridge |
| Tide Water Pumping Station |
| Tippecanoe County Courthouse |
| Tipton County Courthouse |
| Tipton County Jail and Sheriff's Home |
| Tomlinson, George Washington, House |
| Toner Historic District |
| Tousley, Henry, House |
| Tower Building |
| Tower Hotel |
| Town Hall (Castle Hall) |
| Town of Crows Nest Historic District |
| Traders Point Eagle Creek Rural Historic District |
| Turrell, Salmon, Farmstead |
| Twelve Points Historic District |
| Twin Bridges |
| Tyson United Methodist Church |
| Ulen Historic District |
| Union Christian College |
| Union Church and Cemetery, Old |
| Union City Commercial Historic District |
| Union City Public Library |
| Union City School |
| Union County Courthouse |
| University of Notre Dame: Main and South Quadrangles |
| Upper Main Street Historic District |
| U.S. Arsenal (Arsenal Technical High School) |
| U.S. Courthouse and Post Office |
| US Post Office and Courthouse |
| US Post Office-Brazil |
| USS LST 325 (tank landing ship) |
| Utter-Gerig Round Barn |
| Van Arsdel, William C., House |
| Van Buren Terrace Historic District |
| Vance-Tousey House |
| Van Cleave Flats |
| VanHuys, Andrew B., Round Barn |
| Van Nuys Farm |
| Van Reed Farmstead |
| Varsity, The |
| Vehslage, George H., House |
| Venoge Farmstead |
| Vera and the Olga |
| Veraestau |
| Vermillion County Courthouse |
| Vermillion County Jail and Sheriff's Residence |
| Vernon Historic District |
| Versailles School and Tyson Auditorium |
| Victory Noll-St. Felix Friary Historic District |
| Victory Theater and Hotel Sonntag |
| Vienna |
Data from United States Park Service and Wikidata
