| Coal Camps in Sheridan County | Kevin Knapp |
| Coal mine safety, history of | Phil Roberts |
| Coal Slurry Pipeline, History of | Dan Whipple |
| Coal tipple, Reliance | Dick Blust, Jr. |
| Coal, Wyoming business of | Chamois L. Andersen |
| Coal-bed Methane boom, Powder River Basin | Dustin Bleizeffer |
| Cody Mural Visitor Center | |
| Cody Stampede | |
| Cody, William F. and the Pony Express | Tom Rea |
| Cody, William F. as Wyoming Town Founder and Irrigation Tycoon | Robert E. Bonner |
| Cody, William F., hunts with Prince Albert of Monaco, 1913 | John Clayton |
| Cody, Wyoming | Lynn Johnson Houze |
| Coe Library, University of Wyoming | |
| Cokeville Elementary School | |
| Cokeville Elementary School Bombing | Jessica Clark |
| Cokeville survivor oral history, Carol Petersen | Wyoming State Archives |
| Cokeville survivor oral history, Glenna Walker | Wyoming State Archives |
| Cokeville survivor oral history, Jamie Buckley King | Wyoming State Archives |
| Cokeville survivor oral history, Janel Dayton | Wyoming State Archives |
| Cokeville survivor oral history, Kathy Davison | Wyoming State Archives |
| Cokeville survivor oral history, Kevin Walker | Wyoming State Archives |
| Cokeville survivor oral history, Kliss Sparks | Wyoming State Archives |
| Cokeville survivor oral history, LeaKae Roberts Weston | Wyoming State Archives |
| Cokeville survivor oral history, Rachel Walker Hollibaugh | Wyoming State Archives |
| Cokeville survivor oral history, Rich Haskell | Jessica Clark |
| Cokeville survivor oral history, Ron Hartley | Wyoming State Archives |
| Cokeville survivor oral history, Tina Cook | Wyoming State Archives |
| Colby Mammoth Site | |
| Colby Mammoth Site | WyomingHeritage.org |
| Cole Creek train wreck | Lori Van Pelt |
| Como Bluff | |
| Como Bluff | Stephanie Lowe |
| Connor Battlefield | WyomingHeritage.org |
| Connor Battlefield | |
| Connor, Patrick E. | Ellis Hein |
| Converse County, Wyoming | Doug McInnis |
