The welterweight was the third heaviest boxing weight class held as part of the boxing programme at the 1904 Summer Olympics.

[1] Note: Jack Egan originally won the silver medal in the lightweight competition and the bronze medal in the welterweight competition.

Later, it was discovered that his real name was Frank Joseph Floyd, whereas AAU rules made it illegal to fight under an assumed name.

In November 1905, the AAU disqualified Egan from all AAU competitions and ordered him to return all his prizes and medals.

Russell van Horn was upgraded to silver and Peter Sturholdt was awarded the bronze in the lightweight competition while Joseph Lydon retained bronze in the welterweight competition.