- Carter, Rosalynn3
- Case, Clifford P. (Clifford Philip), 1904-19821
- Caward, Neil1
- Chapman, Oscar L. (Oscar Littleton), 1896-19781
- Cheney, Dick, 1941-20252
- Cherokee Nation4
- Cheyenne and Arapaho Tribes23
- Chickasaw Nation87
- Chief justiceships of the United States Supreme Court1
- Child Nutrition Programs (U.S.)1
- Childs, Marquis W. (Marquis William), 1903-19901
- Chiles, Lawton, 1930-19981
- Choctaw Nation of Oklahoma85
- Clancy, Ed1
- Clark, Charles P.4
- Clark, George H.1
- Clausen, Henry C., 1905-19921
- Clay, Lucius D. (Lucius DuBignon), 1897-19781
- Clearinghouse publication1
- Cleland, Max, 1942-20211
