| Cheyenne, Northern, return from Oklahoma | Gerry Robinson |
| Cheyenne, Wyo., history of | Lori Van Pelt |
| Cheyennes tribes come together after Sand Creek | Tom Rea |
| Chinatown, Rock Springs | |
| Chinese Joss House Museum | |
| Chugwater Museum | |
| Church Butte | |
| Church Butte, Oregon Trail landmark | Randy Brown |
| Churches, African-American in Rock Springs | Brie Blasi |
| Civilian Conservation Corps, Wyoming | Kerry Drake |
| Clark, Alonzo | Wyoming State Archives |
| Clark, Clarence Don | Barbara Allen Bogart |
| Clary, William L., pioneer grave of | Randy Brown |
| Clay, John and the Swan Land and Cattle Company | Rebecca Hein |
| Clayton’s Slough | |
| Clayton’s Slough, Oregon Trail site of | WyoHistory.org |
| Coal Bust, Wyoming’s First | Dustin Bleizeffer |
| 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 |
