Indonesia participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Competitors
Medals
Medals awarded to participants of mixed-NOC (Combined) teams are represented in italics. These medals are not counted towards the individual NOC medal tally.
Athletics
Badminton
Indonesia qualified one player based on the Badminton Junior World Rankings. A second player also qualified, but the quota was declined Indonesia later gained another girls' spot after reallocation.
Team
Basketball
Indonesia qualified a girls' team based on the U18 3x3 National Federation Ranking.
Girls' tournament – 1 team of 4 athletes
Shoot-out contest
Beach volleyball
Indonesia qualified one team based on its performance at the 2018 Asian U19 Championship.
Boys' tournament – 1 team of 2 athletes
Golf
Individual
Team
Shooting
Individual
Team
Swimming
Weightlifting
Indonesia qualified two lifters (one boy and one girl) based on its performance at the 2017 World Championships.