| Swain, Louisa, first woman to vote under Wyoming Territory’s new woman suffrage law | Wyoming State Archives |
| 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 |
| Thomson, Thyra, Wyoming Secretary of State 1963-1987 | Wyoming State Archives |
| Torrey, Col. Jay L. | Phil Roberts |
| Torrey’s Rough Riders | Phil Roberts |
| Trabing, August and Charles, freighters in Wyoming Territory | Nancy Trabing Mickelson |
