Manus Boonjumnong (Born: June 23, 1980) of Thailand, won the Light Welterweight gold medal in the 2004 Olympic Games, and the silver medal in the same class in 2008. Boonjumnong has a brother Non Boonjumnong who is a top amateur in the welterweight class.
- 2003 Bronze medalist at Light welterweight at World Amateur championships in Bangkok
2004 Olympic Results (as a Light welterweight)
- Defeated Spyridon Ioannidis (Greece) 28-16
- Defeated Romeo Brin (Philippines) 29-15
- Defeated Willy Blain (France) 20-8
- Defeated Ionut Gheorghe (Romania) 30-9
- Defeated Yudel Jhonson Cedeno (Cuba) 17-11
- 2006 Gold medalist at Light welterweight at Asian games in Doha, Qatar.
- 2007 competed as a Light welteweight at World Amateur championships in Chicago, losing his opening round match to Masatsugu Kawachi of Japan on a 14-9 decision. Boonjumong qualified for the 2008 Olympic games as a Light welterweight, and was his countrys flagbearer.
2008 Olympic results (as a Light welterweight)