| Event: | Boys' 66 kg |
| Games: | 2018 Summer Youth |
| Venue: | Asia Pavilion |
| Date: | 7 October |
| Competitors: | 17 |
| Nations: | 17 |
| Longnames: | true |
| Gold: | Vugar Talibov |
| Goldnoc: | AZE |
| Silver: | Abrek Naguchev |
| Silvernoc: | RUS |
| Bronze: | Antonio Tornal |
| Bronzenoc: | DOM |
| Bronze2: | Javier Peña |
| Bronzenoc2: | ESP |
| Prev: | 2014 |
| Next: | 2026 |
The Boys' 66 kg competition at the 2018 Summer Youth Olympics was held on 7 October, at the Asia Pavilion.
All times are in local time (UTC-3).
Legend