| Triathlon at the III Summer Youth Olympic Games | |
|---|---|
 | |
| Venue | Parque Tres de Febrero |
| Dates | 7–11 October |
| No. of events | 3 (1 boys, 1 girls, 1 mixed) |
| Competitors | 64 (32 boys, 32 girls) from 42 nations |
| Triathlon at the 2018 Summer Youth Olympics | ||
|---|---|---|
 | ||
| Individual | Boys | Girls |
| Relay | Mixed | |
Triathlon at the 2018 Summer Youth Olympics was held from 7 to 11 October. The events took place at Parque Tres de Febrero in Buenos Aires, Argentina.