Mark Leduc (May 4, 1962 – July 22, 2009) was a boxer from Canada, who won a silver medal at the 1992 Barcelona Summer Olympics.

In 1993, Leduc spoke about being a gay athlete in CBC Radio's documentary "The Last Closet", which aired on the weekly sports series The Inside Track;[1] as he was not yet ready to officially come out, the interview was aired anonymously and recorded through a voice filter.

Another Canadian athlete who would also subsequently come out as gay, Mark Tewksbury, also granted an anonymous interview to the same program.

Leduc worked for and volunteered with the Toronto People with AIDS Foundation, later becoming a set-builder and construction worker in the film industry.

He had collapsed in the sauna of St. Mark's Spa and doctors suggested that his death may have resulted from heat stroke.