Ecuador 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. These medals are not counted towards the individual NOC medal tally.
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Ecuador qualified a boys' team based on their overall ranking from the South American Youth Tour.
Ecuador qualified a mixed BMX racing team based on its ranking in the Youth Olympic Games BMX Junior Nation Rankings.
Ecuador qualified one gymnast based on its performance at the 2018 European Junior Championship.
Ecuador qualified one sport climber based on its performance at the 2017 Pan American Youth Sport Climbing Championships.
Ecuador qualified two athletes based on its performance at the 2018 American Youth Olympic Games Qualifier.
Ecuador qualified one athlete based on its performance at the 2017 World Youth Championships.
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