The mixed doubles badminton tournament at the 2020 Summer Olympics took place from 24 to 30 July at the Musashino Forest Sport Plaza at Tokyo.

[1] The reigning champions were Tontowi Ahmad and Liliyana Natsir of Indonesia, who were not defending their title with both having retired.

The badminton qualification system provided for 16 mixed doubles teams (32 players).

Following revisions due to the COVID-19 pandemic, the qualifying periods were set between 29 April 2019 to 15 March 2020 and 4 January to 13 June 2021, with the ranking list of 15 June 2021 deciding qualification.

[2] The knockout stage was a three-round single-elimination tournament with a bronze-medal match.