| Dawes General Allotment Act, 1887 | WyoHistory.org |
| Dayton, Janel, Cokeville survivor oral history | Wyoming State Archives |
| Dayton, Wyo. | |
| De Smet, Father in Wyoming | Rebecca Hein |
| De Smet, Father monument of first Cathollic mass | |
| Deer Creek Stage Station | |
| Deming, W. Edwards | Doug McInnis |
| Devil's Gate Interpretive Site | |
| Devils Tower | WyomingHeritage.org |
| Devils Tower National Monument | |
| Devil’s Gate | Wyoming State Historic Preservation Office |
| Diamond Hoax, 1872 | Dick Blust, Jr. |
| Diamond L. “Slim” Clifton site | |
| Dick Cheney Alumni Field | |
| Dick Cheney Federal Building | |
| Dickinson, Anna, speaks in Cheyenne, 1869 | Tom Rea |
| Dinosaurs | Annette Hein |
| Dixon, Joseph K. | Johanna Wickman |
| Douglas Railroad Interpretive Center | |
| Downey, June Etta, longtime University of Wyoming psychology professor | Rebecca Hein |
| Downey, Stephen Wheeler | Tyler Eastman |
| Driving Tour of Wyoming’s western boundary | |
| Dry Farming | Carl V. Hallberg |
| Dry Sandy Crossing | WyoHistory.org |
| Dubois Museum | |
| Dude ranching, history of in Wyoming | John Clayton |
| Dull Knife Fight, 1876 | Gerry Robinson |
| Durand, Earl, Park County poacher and bank robber | Lillian Turner |
| Durlacher House | |
| Durlacher House | Stephanie Lowe |
| Earhart, Amelia, Wyoming connections of | Lori Van Pelt |
| Eastern Shoshone Tribe, 1905 Land Cession Agreement | WyoHistory.org |
| Eastern Shoshone, two Fort Bridger treaties with | WyoHistory.org |
| Eclipses, solar | Rebecca Hein |
| Ecoffey family and 1868 wagon train attack | Rebecca Hein |
| Edison, Thomas in Wyoming Territory | Phil Roberts |
