[1] Track Field Australia qualified a boys' and girls' team based on their performance at the 2018 Oceania U19 Championship.

[2] de Groot–Immers (NED) L 0–2 Villar–Churin (ARG) L 0–2 Baumann–Betschart (SUI) L 0–2 Australia selected three athletes to compete based on their performance at the 2018 Youth Oceania Confederation Boxing Championships.

[1] Key: Australia qualified one boat based on its performance at the 2018 World Qualification Event.

[8] Australia qualified one boat based on its performance at the 2017 World Junior Rowing Championships.

[9] They would also qualify a girls' single sculls boat at the Oceania Youth Olympic Games Qualification event.