At the 1904 Summer Olympics, seven boxing events were contested. Only USA boxers competed. The contestants of the lower class could also compete in the higher class. So Oliver Kirk is the one and only boxer who has won two gold medals in the same Olympics. George Finnegan , Harry Spanger and Charles Mayer managed to win one gold and one silver medal and Jack Eagan one silver and one bronze medal. They are unique in olympic boxing history.
Flyweight (47.6 kg / 105 lb)
| Pos | Athlete |
| 1 | George Finnegan (USA) |
| 2 | Miles Burke (USA) |
Only two boxers competed.
Bantamweight (52.2 kg / 115 lb)
| Pos | Athlete |
| 1 | Oliver Kirk (USA) |
| 2 | George Finnegan (USA) |
Only two boxers competed.
Featherweight (56.7 kg / 125 lb)
| Pos | Athlete |
| 1 | Oliver Kirk (USA) |
| 2 | Frank Haller (USA) |
| 3 | Fred Gilmore (USA) |
Lightweight (61.2 kg / 135.5 lb)
| Pos | Athlete |
| 1 | Harry Spanger (USA) |
| 2 | Jack Eagan (USA) |
| 3 | Russell Van Horn (USA) |
Welterweight (65.8 kg / 145 lb)
| Pos | Athlete |
| 1 | Albert Young (USA) |
| 2 | Harry Spanger (USA) |
| 3 | Jack Eagan (USA) |
| 3 | Joseph Lydon (USA) |
Middleweight (71.7 kg / 158 lb)
| Pos | Athlete |
| 1 | Charles Mayer (USA) |
| 2 | Benjamin Spradley (USA) |
Only two boxers competed.
Heavyweight (over 71.7 kg / 158 lb)
| Pos | Athlete |
| 1 | Samuel Berger (USA) |
| 2 | Charles Mayer (USA) |
| 3 | William Michaels (USA) |
