| Crook, Gen. George, campaigns of 1876 | Lori Van Pelt |
| Crossings, North Platte River; Oregon Trail sites of | WyoHistory.org |
| Crow Creek Ranch | Stephanie Lowe |
| Curry, Peggy Simson, Wyoming Poet Laureate 1981-1987 | Lori Van Pelt |
| Dana, Wyo., Black coal miners in | Brigida R. (Brie) Blasi |
| Daniel Lantz grave | |
| Daniel Lantz grave | Randy Brown |
| Dansie, Charlotte, pioneer grave of | Randy Brown |
| David, Bob in World War I | Tom Rea |
| Davison, Kathy, Cokeville survivor oral history | Wyoming State Archives |
| 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 |
