Host City: St. Louis, United States
Venue(s): Physical Culture Gymnasium, Washington University, St. Louis
Date Started: September 21, 1904
Date Finished: September 22, 1904
Format: Single elimination tournament.
Sam Berger won two bouts to win the gold medal, defeating Bill Michaels by a knockout in round three in the first match, and then defeating Charles Mayer by decision in the final. Berger had a brief pro career but then served as a sparring partner and manager to future World Heavyweight Champion Jim Jeffries. The 1904 AAU Champion was William Rodenbach, who had also won that title in 1901, but was primarily a middleweight, having won that AAU title from 1900-04. He did not enter either class at the Olympics.