| Event: | Judo |
| Games: | 2018 Summer Youth |
| Venue: | Parque Polideportivo Roca |
| Dates: | 7–10 October |
| Num Events: | 9 (4 boys, 4 girls, 1 mixed) |
| Prev: | 2014 |
| Next: | 2026 |
Judo at the 2018 Summer Youth Olympics was held from 7 to 10 October 2018.
| 55 kg | |||
| 66 kg | |||
| 81 kg | |||
| 100 kg | |||
| 44 kg | |||
| 52 kg | |||
| 63 kg | |||
| 78 kg | |||
| Mixed Team | Beijing | Athens | Rio de Janeiro |
| London |