| Event: | Boys' 81 kg |
| Games: | 2018 Summer Youth |
| Venue: | Parque Polideportivo Roca |
| Date: | 8 October |
| Competitors: | 12 |
| Nations: | 12 |
| Gold: | Adrian Şulcă |
| Goldnoc: | ROU |
| Silver: | Martin Bezděk |
| Silvernoc: | CZE |
| Bronze: | Keagan Young |
| Bronzenoc: | CAN |
| Bronze2: | Mark van Dijk |
| Bronzenoc2: | NED |
| Prev: | 2014 |
| Next: | 2026 |
The Boys' 81 kg competition at the 2018 Summer Youth Olympics was held on 8 October at the Asia Pavilion.
All times are in local time (UTC-3).
Legend