| Event: | Light welterweight |
| Championship: | 2021 AIBA World Boxing Championships |
| Dates: | 26 October – 6 November |
| Venue: | Štark Arena |
| Location: | Belgrade, Serbia |
| Competitors: | 44 |
| Nations: | 44 |
| Gold: | Andy Cruz |
| Gold Nation: | CUB |
| Silver: | Kerem Özmen |
| Silver Nation: | TUR |
| Bronze: | Reese Lynch |
| Bronze Nation: | SCO |
| Bronze2: | Hovhannes Bachkov |
| Bronze2 Nation: | ARM |
| Prev: | 2019 |
| Next: | 2023 |
The Light welterweight competition at the 2021 AIBA World Boxing Championships was held between 26 October and 6 November.[1]