Worapoj Petchkoom (Thai: วรพจน์ เพชรขุ้ม; RTGS: Woraphot Phetkhum; born May 18, 1981) is a Thai boxer who competed in the bantamweight (54 kg) at the 2004 Summer Olympics and won the silver medal, after losing in the final to Cuban superstar Guillermo Rigondeaux.

In 2005 he competed for Thailand at the Boxing World Cup in Moscow, Russia, losing both his matches in the preliminary round.

At the Asian Games 2006 he lost to eventual winner Joan Tipon 13:13 (countback).

At the world 2007 he was upset by Hungarian David Oltvanyi 9:10 in an early round.

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