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

Hong Kong qualified a rider at the FEI World Jumping Challenge 2nd Competition Category A.

[2] Hong Kong qualified four athletes based on its performance at the 2018 Cadet World Championship.

[3] Hong Kong qualified one boat based on his performance at the 2018 Asian Youth Olympic Games Qualification Regatta.

[5][6][7] Hong Kong qualified one table tennis player based on her performance at the Road to Buenos Aires (Europe) series.