Indonesia at the 2020 Summer Olympics

Indonesia competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were rescheduled for 23 July to 8 August 2021, due to the COVID-19 pandemic. It was the nation's sixteenth appearance at the Summer Olympics.

At the Games, Indonesia sent 28 athletes; the similar total with 2016 Summer Olympics. It consisted of 16 men and 12 women, competing in 8 sports. Twenty-five Indonesians had qualified to compete, while two swimmers and one female sprinter obtained their spots through wild card entries. In this edition, surfing made its Olympic debut (as new sport) by Rio Waida, who became the nation's de facto flag bearer at the opening ceremony.

The Indonesian roster featured seven returning Olympians, with three of them headed to their third Games: badminton shuttler Greysia Polii in the women's doubles badminton, 2008 Olympic gold medalist Hendra Setiawan in men's doubles badminton together with his partner Mohammad Ahsan, two-time Olympian Praveen Jordan in mixed doubles badminton, three-time Olympic bronze and silver medalists Eko Yuli Irawan in weightlifting, three-time Olympian Deni in weightlifting, and two-time Olympian Riau Ega Agatha in archery.

Indonesia left Tokyo with five medals (one gold, one silver and three bronzes), improving its total medal tally from the previous Olympics. Greysia Polii and Apriyani Rahayu, who won the women's doubles event of badminton, are the country's only gold medalists. Their victory made Indonesia the second country after China to have won gold medals in all five disciplines of badminton at the Olympics. At 33 years and 356 days of age, Polii also became the oldest female badminton player to win an Olympic gold medal.