The men's welterweight event was part of the boxing programme at the 1920 Summer Olympics.

The weight class was the fourth-heaviest contested, and allowed boxers of up to 147 pounds (66.7 kilograms).

The competition was held from August 21, 1920 to August 24, 1920.

18 boxers from ten nations competed.

[1] The gold medal bout between Bert Schneider and Alexander Ireland ended in a draw, but the referee ordered the exhausted boxers to fight an extra round.