Armenia participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.

Medals awarded to participants of mixed-NOC teams are represented in italics.

Armenia qualified one rhythmic gymnast based on its performance at the European qualification event.

[1] Armenia qualified one sport shooter based on its performance at the 2018 European Championships.

[2] Armenia qualified one athlete based on its performance at the 2017 World Youth Championships.