| Swimming at the III Summer Youth Olympic Games | |
|---|---|
 | |
| Venue | Natatorium |
| Dates | 7–12 October |
| No. of events | 36 (17 boys, 17 girls, 2 mixed) |
| Competitors | 390 from 139 nations |
| Swimming at the 2018 Summer Youth Olympics | ||
|---|---|---|
 | ||
| Freestyle | ||
| 50 m | boys | girls |
| 100 m | boys | girls |
| 200 m | boys | girls |
| 400 m | boys | girls |
| 800 m | boys | girls |
| Backstroke | ||
| 50 m | boys | girls |
| 100 m | boys | girls |
| 200 m | boys | girls |
| Breaststroke | ||
| 50 m | boys | girls |
| 100 m | boys | girls |
| 200 m | boys | girls |
| Butterfly | ||
| 50 m | boys | girls |
| 100 m | boys | girls |
| 200 m | boys | girls |
| Individual medley | ||
| 200 m | boys | girls |
| Freestyle relay | ||
| 4×100 m | boys | girls |
| mixed | ||
| Medley relay | ||
| 4×100 m | boys | girls |
| mixed | ||
Swimming at the 2018 Summer Youth Olympics was held from 7 to 12 October at the Natatorium in Buenos Aires, Argentina.