Educational magazines
- Cox, Sebastian
- Cox, Vicki 1945-
- Cox, William Trevor 1928-
- Coy, John 1958–
- Coyle, Daniel
- Coyle, Diane
- Coyle, Harold 1952- (Harold W. Coyle, Harold William Coyle)
- Coyle, Richard Jay 1948-
- Coyne, John 1940- (John P. Coyne)
- Coyne, Tami 1960-
- Coyne, Tom 1974(?)-
- Coyote, Ivan E. 1969–
- Cozarinsky, Edgardo 1939-
- Cozzens, Donald B. 1939(?)-
- Crace, Jim 1946-
- Crace, Jim 1946- (James Turton)
- Cracknell, Kenneth 1935-
- Craft, Francine 1929–
- Craft, Larry L. 1947-
- Craft, Robert 1923-