Educational magazines
- Cosman, Madeleine Pelner 1937-2006
- Cosper, Darcy
- Cossman, E(li) Joseph 1918-2002
- Costantino, Roselyn
- Costas, Robert (Quinlan) 1952–
- Costello, Matthew J. 1948-
- Coster, Will 1963- (W. Coster)
- Costigan, James 1928(?)-2007
- Costikyan, Greg 1959-
- Cote, Nancy
- Côté, Richard N. 1945–
- Cotroneo, Roberto 1961–
- Cottam, Francis 1957-
- Cotten, Cynthia
- Cotterill, Colin 1952-
- Cotterill, Colin 1952–
- Cottom, Daniel
- Cotton, John 1925-2003
- Cottringer, Anne 1952-
- Cottrol, Robert J. 1949- (Robert James Cottrol)