Dominican Republic participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Archery
Dominican Republic qualified one archer based on its performance at the American Continental Qualification Tournament.
Individual
Team
Athletics
Badminton
Dominican Republic qualified one player based on the Badminton Junior World Rankings.
Singles
Team
Futsal
Summary
Group D
Judo
Sailing
Dominican Republic qualified one boat based on its performance at the North American and Caribbean IKA Twin Tip Qualifiers. They later qualified a boat in the boys' event based on its performance at the 2018 IKA Twin Tip Racing Youth World Championship.