| Event: | Flyweight |
| Championship: | 2021 AIBA World Boxing Championships |
| Dates: | 26 October – 6 November |
| Venue: | Štark Arena |
| Location: | Belgrade, Serbia |
| Competitors: | 32 |
| Nations: | 32 |
| Gold: | Saken Bibossinov |
| Gold Nation: | KAZ |
| Silver: | Roscoe Hill |
| Silver Nation: | USA |
| Bronze: | Akhtem Zakirov |
| Bronze2: | Thanarat Saengphet |
| Prev: | 2019 |
| Next: | 2023 |
The Flyweight competition at the 2021 AIBA World Boxing Championships was held from 26 October to 6 November 2021.[1]