See main article: Boxing at the 2004 Summer Olympics. The 2nd AIBA American 2004 Olympic Boxing Qualifying Tournament was held in Rio de Janeiro, Brazil from April 4 to April 11, 2004. The competition was the final opportunity for amateur boxers from North-, Central- and South America to qualify for the 2004 Summer Olympics (the only other places were already allocated at the 2003 Pan American Games). The top two boxers in each weight division gained a place in the Olympics, with the exception of the heavyweight and super heavyweight divisions in which just the winner was entered.
| Light Flyweight ( - 48 kilograms) | ||||
| Flyweight ( - 51 kilograms) | ||||
| Bantamweight ( - 54 kilograms) | ||||
| Featherweight ( - 57 kilograms) | ||||
| Lightweight ( - 60 kilograms) | ||||
| Light Welterweight ( - 64 kilograms) | ||||
| Welterweight ( - 69 kilograms) | ||||
| Middleweight ( - 75 kilograms) | ||||
| Light Heavyweight ( - 81 kilograms) | ||||
| Heavyweight ( - 91 kilograms) | ||||
| Super Heavyweight (+ 91 kilograms) |
See main article: Boxing at the 2004 Summer Olympics – Light flyweight.
See main article: Boxing at the 2004 Summer Olympics – Flyweight.
See main article: Boxing at the 2004 Summer Olympics – Bantamweight.
See main article: Boxing at the 2004 Summer Olympics – Featherweight.
See main article: Boxing at the 2004 Summer Olympics – Lightweight.
See main article: Boxing at the 2004 Summer Olympics – Light welterweight.
See main article: Boxing at the 2004 Summer Olympics – Welterweight.
See main article: Boxing at the 2004 Summer Olympics – Middleweight.
See main article: Boxing at the 2004 Summer Olympics – Light heavyweight.
See main article: Boxing at the 2004 Summer Olympics – Heavyweight.
See main article: Boxing at the 2004 Summer Olympics – Super heavyweight.