S    
 Salazar, Frank 12-16-1939 Electrocuted Nolan Huntsville, TX 223 Murder  
 Sampson, Maurice 9-29-1954 Electrocuted Harris Huntsville, TX 380 Murder  
 Sanders, Mathis 4-27-1929 Electrocuted Brazos Huntsville, TX 65 Rape  
 San Miguel, Jessy 6-29-2000 Lethal Injection Dallas Huntsville, TX 999008 Robbery  
 Santana, Carlos 3-23-1993 Lethal Injection Harris Huntsville, TX 695 Robbery  
 Santellan, Jose Sr. 4-10-2002 Lethal Injection Kerr Huntsville, TX 999140 Murder  
 Satchell, Bryant 3-17-1927 Electrocuted McLennan Huntsville, TX 38 Murder  
 Satterwhite, John 8-16-2000 Lethal Injection Bexar Huntsville, TX 651 Robbery  
 Sattiewhite, Vernon L. 8-15-1995 Lethal Injection Bexar Huntsville, TX 857 Kidnapping  
 Saulter, Joseph 7-9-1948 Electrocuted Galveston Huntsville, TX 301 Murder  
 Saunders, George 2-13-1912 Lynched Harrison Marshall, TX n/a    
 Savage, Henry 4-30-1952 Electrocuted Grimes Huntsville, TX 359 Rape  
 Sawyer, Charles 6-25-1917 Lynched Galveston Galveston, TX n/a    
 Sawyers, John 5-18-1993 Lethal Injection Harris Huntsville, TX 742 Robbery  
Saxon, Robert 8-1881 Lynched Orange Orange Co., TX n/a Murder  
 Schulz, 6-29-1855 Hanged   Galveston Island      
 Scott, Jordan 5-22-1930 Electrocuted McLennan Huntsville, TX 76 Murder  
 Servina, Esequiel 9-7-1928 Electrocuted Bexar Huntsville, TX 54 Rape  
 Sharp, Michael 11-19-1997 Lethal Injection Crockett Huntsville, TX 740 Kidnapping  
 Shaver, Jimmy 7-25-1958 Electrocuted Bell Huntsville, TX 404 Murder  
 Sheppard, Munn 6-28-1891 Lynched Cass Cass County, TX n/a    
 Shield, Joe 8-14-1931 Electrocuted Brown Huntsville, TX 91 Murder  
 Shipman, Charles 11-14-1918 Lynched Fort Bend Fort Bend Co., TX n/a    
 Simmons, Tillman 9-26-1927 Electrocuted Bexar Huntsville, TX 43 Murder  
 Sims, L. C. 9-5-1951 Electrocuted Collin Huntsville, TX 349 Rape  
 Sims, Willie 4-25-1948 Electrocuted Harris Huntsville, TX 300 Rape  
 Skillern, Doyle 1-16-1985 Lethal Injection Lubbock Huntsville, TX 518 Policeman  
 Slater, Phillip 2-4-1959 Electrocuted Montgomery Huntsville, TX 411 Murder  
 Smith, Bert 9-21-1917 Lynched   Goose Creek, TX n/a    
 Smith, Bill 10-17-1930 Electrocuted Jones Huntsville, TX 51 Murder  
 Smith, Cleo 8-24-1948 Electrocuted Bowie Huntsville, TX 308 Rape  
 Smith, Gabe 3-19-1935 Electrocuted Harris Huntsville, TX 142 Murder  
 Smith, Henry 1-31-1893 Lynched Lamar Paris, TX n/a    
 Smith, James 6-26-1990 Lethal Injection Harris Huntsville, TX 763 Robbery  
 Smith, Jessie 8-4-1959 Electrocuted Harris Huntsville, TX 413 Murder  
 Smith, John 4-16-1926 Electrocuted Brown Huntsville, TX 31 Murder  
 Smith, Larry 8-22-1986 Lethal Injection Dallas Huntsville, TX 643 Robbery  
 Smith, Rickie 9-21-1999 Lethal Injection Harris Huntsville, TX 999116 Murder  
 Smith, Thomas 6-28-1892 Lynched Tyler Spurger, TX n/a    
 Smith, William Jr. 4-5-1950 Electrocuted Harris Huntsville, TX 324 Murder  
 Sneed, Joe 1-3-1963 Electrocuted Dallas Huntsville, TX 439 Rape  
 Snow, E. M. 8-12-1927 Electrocuted Erath Huntsville, TX 41 Murder  
 Soria, Juan 7-26-2000 Lethal Injection Tarrant Huntsville, TX 837 Robbery  
 Spence, David 4-3-1997 Lethal Injection McLennan Huntsville, TX 773 Kidnapping  
 Spencer, William 10-5-1916 Lynched   Graceton, TX n/a    
 Stalcup, Virgil 5-4-1936 Electrocuted Lubbock Huntsville, TX 165 Murder  
 Stanley, Richard 1-23-1913 Lynched Titus Fullbright, TX n/a    
 Stanton, Ed 9-28-1934 Electrocuted Swisher Huntsville, TX 133 Murder  
 Starvaggi, Joseph 9-10-1987 Lethal Injection Montgomery Huntsville, TX 586 Robbery  
 Stein, Bobby 9-5-1962 Electrocuted Harris Huntsville, TX 438 Murder  
 Stephens, J. B. 12-19-1944 Electrocuted Ellis Huntsville, TX 266 Murder  
 Stewart, Carl 12-29-1933 Electrocuted Travis Huntsville, TX 121 Murder  
 Stewart, Darryl 5-4-1993 Lethal Injection Harris Huntsville, TX 664 Burglary  
 Stewart, Eligha 6-12-1935 Electrocuted Harris Huntsville, TX 150 Murder  
 Stickney, Howard 5-23-1962 Electrocuted Harris Huntsville, TX 423 Murder  
 Stoker, David, 6-16-1997 Lethal Injection Hale Huntsville, TX 892 Robbery  
 Stone, Benjamin 9-25-1997 Lethal Injection Harris Huntsville, TX 999187 Multiple-Murder  
 Stovall, Cleveland 9-11-1949 Electrocuted Tarrant Huntsville, TX 320 Rape  
 Strauther, Clem 3-18-1896 Hanged Austin Bellville, TX n/a Murder  
 Streetman, Robert 1-7-1988 Lethal Injection Hardin Huntsville, TX 746 Burglary  
 Sullivan, William 9-23-1892 Lynched Grimes Plantersville, TX n/a    
 Sweeney, Peter 2-1900 Lynched Port Arthur, TX n/a Acquitted  

Peter Sweeney was lynched after he had been acquitted by a jury of his peers.

Sources:
Texas Department of Criminal Justice Home Page for executions after 1977.  
The Rope, The Chair, And The Needle by James W. Marquart, ©1994, University of Texas Press for those executions before 1977.
Without Sanctuary by James Allen and John Littlefield, © 2000, for early lynchings in Texas.