Colin may refer to:
- Colin (film), a 2008 Cannes film festival zombie movie
- Colin (horse) (1905–1932), thoroughbred racehorse
- Colin (humpback whale), a humpback whale calf abandoned north of Sydney, Australia, in August 2008
- Colin (given name), people with the given name Colin
- Colin (security robot), in Mostly Harmless of the The Hitchhiker's Guide to the Galaxy series by Douglas Adams
- Tropical Storm Colin (2010), an Atlantic storm in 2010
- Colin the Vet, a fictional character in the UK comic The Beano