Australia participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Track
Field
Australia qualified a boys' and girls' team based on their performance at the 2018 Oceania U19 Championship.
Australia selected three athletes to compete based on their performance at the 2018 Youth Oceania Confederation Boxing Championships.
Australia qualified one boat based on its performance at the 2018 World Qualification Event.
Matthew Carter competed in the boys' 3m springboard event and Alysha Koloi competed in the girls' 3m springboard event.
Australia qualified a rider based on its ranking in the FEI World Jumping Challenge Rankings.
Australia qualified two athletes based on its performance at the 2018 Cadet World Championship.
Australia qualified one gymnast based on its performance at the 2018 Oceania Junior Championship.
Australia qualified one gymnast based on its performance at the 2018 Oceania Junior Championship.
Australia qualified two gymnasts based on its performance at the 2018 Oceania Junior Championship.
Australia qualified two pentathletes based on its performance at the Asian/Oceanian Youth Olympic Games Qualifier.
Australia qualified two roller skaters based on its performance at the 2018 Roller Speed Skating World Championship.
Australia qualified one boat based on its performance at the 2017 World Junior Rowing Championships. They would also qualify a girls' single sculls boat at the Oceania Youth Olympic Games Qualification event.
Australia qualified two boats based on its performance at the Oceania Techno 293+ Youth Olympic Games Qualifier. They also qualified another boat at the 2018 World Nacra 15 Championship. A quota in the IKA Twin Tip Racing was achieved at the Asian and Oceania IKA Twin Tip Racing Qualifiers.
Australia qualified three sport shooters based on its performance at the 2017 Oceania Championships.
Australia qualified one sport climber based on its performance at the 2017 Oceania Youth Sport Climbing Championships.
Australia selected 8 athletes (4 boys and 4 girls) to compete in swimming.
Australia qualified two athletes based on its performance at the 2018 Oceania Youth Olympic Games Qualifier.
Australia qualified one athlete based on their performance at the 2018 Oceania Cadet Championships.
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