[3] Hong Kong entered four badminton players for each of the following events into the Olympic tournament based on the BWF World Race to Tokyo Rankings: one entry each in the men's and women's singles and a pair in the mixed doubles.

2018 world bronze medalist Grace Lau qualified directly for the women's kata category by finishing among the top four karatekas at the end of the combined WKF Olympic Rankings.

[12] Hong Kong qualified one boat in the women's single sculls for the Games by finishing first in the B-final and securing the fourth of five berths available at the 2021 FISA Asia & Oceania Olympic Qualification Regatta in Tokyo, Japan.

[17][18] Moreover, an additional berth was awarded to the Hong Kong table tennis players competing in the inaugural mixed doubles by advancing to the semifinal stage of the 2019 ITTF World Tour Grand Finals in Zhengzhou, China.

British-born Oscar Coggins secured a place in the men's event by topping the list of individual triathletes from Asia and Oceania vying for qualification based on the ITU World Rankings.