Host City: St. Louis, United States
Venue(s): Francis Field, Washington University, St. Louis
Date Started: October 14, 1904
Date Finished: October 15, 1904
Format: Single-elimination tournament
There were three entrants in this class with the final coming down to George Mehnert winning a decision over Gustav Bauer in the final. Mehnert had also won the AAU Championship in this class in 1903. Bauer would win the title from 1905-07, when Mehnert moved up in weight and was the bantamweight champion with Mehnert winning again as a flyweight in 1908. That qualified Mehnert for the 1908 Olympics, and he defended his gold medal there, one of only two 1904 Olympic champions who competed in London, along with Jack Niflot.