C
- Ippolito Caffi (1972 airmail) Canaletto painting wrongly attributed to him
- Giovanni Antonio Canaletto (1972 airmail)
- Paul Cézanne (1989)
- James Chadwick (1995)
- Owen Chamberlain (1995)
- Octave Chanute (1973)
- Claude Chappe (1993)
- Winston Churchill (1965 airmail)
- André Citroën (1978)
- Nat King Cole (1972)
- Christopher Columbus (1992 airmail)
- Charles Conrad, Jr. (1999)
- James Cook (1979 airmail)
- Nicolaus Copernicus (1993)
- Carl F. Cori (1995)
- Gerty T. Cori (1995)
- Pierre de Coubertin (1987)
Read more about this topic: List Of People On Stamps Of Gabon