| Event: | Men's lightweight boxing |
| Games: | 1920 Summer |
| Venue: | Antwerp Zoo auditorium |
| Dates: | August 21–24 |
| Competitors: | 16 |
| Nations: | 10 |
| Gold: | Samuel Mosberg |
| Goldnoc: | USA |
| Silver: | Gotfred Johansen |
| Silvernoc: | DEN |
| Bronze: | Clarence Newton |
| Bronzenoc: | CAN |
| Prev: | 1908 |
| Next: | 1924 |
The men's lightweight event was part of the boxing programme at the 1920 Summer Olympics. The weight class was the fourth-lightest contested, and allowed boxers of up to 135.5 pounds (61.2 kilograms). The competition was held from August 21, 1920 to August 24, 1920. 16 boxers from ten nations competed.[1]