| Strausner, Adam LeRoy, oral history | Dana Van Burgh |
| Sullivan, Mike | Wyoming State Archives |
| Sullivan, Mike, U.S. ambassador to Ireland, oral history | Tom Rea |
| Swain, Louisa, first woman to vote under Wyoming Territory’s new woman suffrage law | Wyoming State Archives |
| Tarquinio, Enzo | Laura E. Ruberto |
| Thaxton, Edith, on Dances in the Bighorn Basin | Washakie Museum and Cultural Center |
| Thayer, John | Wyoming State Archives |
| Thermopolis, Wyo., sale of hot springs by Eastern Shoshone and Northern Arapaho tribes | WyoHistory.org |
| Thomas, Oleta, oral history | Casper College Western History Center |
| Thomas, Sarah, pioneer grave of | Randy Brown |
