Texas - Area of significance: Architecture
| Sims House |
| Sims, O. B., House |
| Sinclair Building |
| Sinclair Station, (Old) |
| Singer Sewing Company |
| Singleton, Capt. William E., House |
| Sisterdale Valley District |
| Sixth Street Historic District |
| Smathers-Demorse House |
| Smith-Barron House |
| Smith-Clark and Smith-Bickler Houses |
| Smith County Jail, 1881 |
| Smith House |
| Smith, John Sterling, Jr., House |
| Smith, Louis H., Inc. Firestone Store |
| Smith-Marcuse-Lowry House |
| Smith Ranch |
| Smithville Commercial Historic District |
| Smithville Residential Historic District |
| Smith, W. D., House |
| Smith-Young Tower |
| Smoot, Richmond Kelley, House |
| SMS Building |
| Smyth, Andrew, House |
| Snider Hall |
| Snyder, Fred and Annie, House |
| Socorro Mission |
| Solon, John, House |
| Somervell County Courthouse |
| Source of the River District |
| South Alamo Street-South Mary's Street Historic District |
| South Boulevard-Park Row Historic District |
| South Bridge Street Historic District |
| South Center Street Historic District |
| Southern Hotel |
| Southern Pacific Depot Historic District |
| Southern Pacific Railroad Depot |
| Southern Pacific Railroad Freight Depot |
| Southern Pacific Railroad Passenger Depot |
| Southern Pacific Railroad Passenger Station |
| Southgate-Lewis House |
| South Main Street Historic District |
| South Overton Residential Historic District |
| South Side Historic District |
| South Side Masonic Lodge No. 1114 |
| South Side Residential Historic District |
| South Texas National Bank |
| Southwestern Telegraph and Telephone Building |
| Southwestern University Administration Building and Mood Hall |
| Spake, Jacob and Eliza, House |
| Spanish Governor's Palace |
| Speaker, J. H., House |
| Spooner, Thomas Harrison and Mollie, House |
| Staacke Brothers Building |
| Stafford Bank and Opera House |
| Stagecoach Inn |
| Stage Coach Inn |
| Stamford City Hall |
| Stanard-Tilton Flour Mill |
| Standley House |
| Starcke, Richard, House |
| Starcke, Richard, House |
| Star Drug Store |
| Star Engraving Company Building |
| Stark, W. H., House |
| Starr House |
| State Epileptic Colony Historic District |
| State Lunatic Asylum |
| State National Bank |
| State National Bank Building |
| Stavely-Kunz-Johnson House |
| St. David's Episcopal Church |
| St. Edward's University Main Building and Holy Cross Dormitory |
| Steele House |
| Steffens-Drewa House Complex |
| Stephen F. Austin Elementary School |
| Stephens County Courthouse |
| Stephenville Downtown Historic District |
| Sterling-Berry House |
| Sterling City Gulf, Colorado & Santa Fe Railway Passenger Depot |
| Sterling, Ross,S., House |
| Sterne-Hoya Historic District |
| Stevens Building |
| Stevens, Elisha, House |
| Stevenson, Joseph R. and Mary M., House |
| Stewart, Dr. James M. and Dove, House |
| Stilley-Young House |
| Stillman, Charles, House |
| Stinson, John R., House |
| Stith, William and Evla, House |
| St. James Episcopal Church |
| St. James Methodist Episcopal Church |
| St. John's Episcopal Church |
| St. John's Evangelical Lutheran Church |
| St. John's Seminary |
| St. John the Baptist Catholic Church |
| St. Joseph's Church |
| St. Louis and San Francisco Railway Depot (Frisco Depot) |
| St. Louis Hall at St. Mary's University |
| St. Louis Southwestern Railway (Cotton Belt) Passenger Depot |
Data from United States Park Service and Wikidata
