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.
Hong Kong qualified four athletes based on its performance at the 2018 Cadet World Championship.
Hong Kong qualified one boat based on his performance at the 2018 Asian Youth Olympic Games Qualification Regatta.
Hong Kong qualified two boats based on their performance at the 2017 World Techno 293+ Championships.
Hong Kong qualified one table tennis player based on her performance at the Road to Buenos Aires (Europe) series.
Hong Kong qualified two athletes based on its performance at the 2018 Asian Youth Olympic Games Qualifier.