| Matthew Gahan | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 1975 11, df=yes |
| Birth Place: | Lismore, New South Wales |
| Stat2label: | ERA |
| Stat3label: | Strikeouts |
Matthew Gahan (born 26 November 1975 in Lismore, New South Wales) is an Australian baseball player who played for the Australian national team.
Gahan was signed in 2000 by the New York Mets organisation and played with the Brooklyn Cyclones and Capital City Bombers in 2001, before being promoted to Advanced A with the St. Lucie Mets in 2002. Gahan also played in the International Baseball League of Australia with the International All-Stars in 2000/2001. He played Claxton Shield with the Queensland Rams (as Lismore is considered part of Baseball Queensland), including a Golden Arm award in the 2006 Claxton Shield, and made his national debut in 2002, including appearances in the 2006 and 2009 World Baseball Classic.