John Mugabi (born 4 March 1960) is a Ugandan former professional boxer who competed from 1980 to 1991, and 1996 to 1999.
He held the WBC super-welterweight title from 1989 to 1990, and challenged twice for world titles at middleweight, including the undisputed championship.
Mugabi was part of an exceptionally talented group of light-middleweights and middleweights during a "golden era" of the 1980s which included Marvin Hagler, Sugar Ray Leonard, Thomas Hearns, Wilfred BenÃtez, Davey Moore, and Roberto Durán.
As an amateur, Mugabi won a silver medal in the welterweight division at the 1980 Summer Olympics, and was the only medallist for Uganda at the event.
He is listed #38 on Ring Magazine's list of 100 greatest punchers of all time