| Event: | Cruiserweight |
| Championship: | 2021 AIBA World Boxing Championships |
| Dates: | 27 October – 5 November |
| Venue: | Štark Arena |
| Location: | Belgrade, Serbia |
| Competitors: | 32 |
| Nations: | 32 |
| Gold: | Loren Alfonso |
| Gold Nation: | AZE |
| Silver: | Keno Machado |
| Silver Nation: | BRA |
| Bronze: | Victor Schelstraete |
| Bronze Nation: | BEL |
| Bronze2: | Herich Ruiz |
| Bronze2 Nation: | CUB |
| Next: | 2023 |
The Cruiserweight competition at the 2021 AIBA World Boxing Championships was held between 27 October and 5 November.[1]