| Tennis at the 2018 Summer Youth Olympics | |
|---|---|
 | |
| Date | 7–14 October |
| Edition | 3rd |
| Location | Buenos Aires Lawn Tennis Club |
| Champions | |
| Mixed doubles | |
 Yuki Naito / Naoki Tajima (JPN) | |
| Boys' singles | |
 Hugo Gaston (FRA) | |
| Girls' singles | |
 Kaja Juvan (SLO) | |
| Boys' doubles | |
 Sebastián Báez (ARG) / Facundo Díaz Acosta (ARG) | |
| Girls' doubles | |
Kaja Juvan (SLO) / Iga Świątek (POL) | |
Tennis at the 2018 Summer Youth Olympics was held on 7–14 October. The events took place at the Buenos Aires Lawn Tennis Club in Buenos Aires, Argentina.