The bantamweight competition was the third-lowest weight class featured at the 2009 World Amateur Boxing Championships, and was held at the Mediolanum Forum. Bantamweights were limited to a maximum of 54 kilograms in body mass.
| Gold | Detelin Dalakliev |
| Silver | Eduard Abzalimov |
| Bronze | Yankiel León |
| John Nevin |
Yankiel León (semifinals)
Veaceslav Gojan (second round)
Tulashboy Doniyorov (quarterfinals)
Anvar Yunusov (second round)
John Joe Nevin (semifinals)
Kanat Abutalipov (quarterfinals)