| Dates: | 23–28 November |
| Level: | G2L2 |
| Prize Money: | 850000 |
| Venue: | Bali International Convention Center |
| Location: | Badung Regency, Bali, Indonesia |
| Ms: | Viktor Axelsen |
| Country Ms: | DEN |
| Ws: | An Se-young |
| Country Ws: | KOR |
| Md1: | Marcus Fernaldi Gideon |
| Country Md1: | INA |
| Md2: | Kevin Sanjaya Sukamuljo |
| Country Md2: | INA |
| Wd1: | Nami Matsuyama |
| Country Wd1: | JPN |
| Wd2: | Chiharu Shida |
| Country Wd2: | JPN |
| Xd1: | Dechapol Puavaranukroh |
| Country Xd1: | THA |
| Xd2: | Sapsiree Taerattanachai |
| Country Xd2: | THA |
| Previous: | 2019 |
| Next: | 2022 |
The 2021 Indonesia Open (officially known as the SimInvest Indonesia Open 2021 for sponsorship reasons) was a badminton tournament that took place at the Bali International Convention Center in Nusa Dua, Badung Regency, Bali, Indonesia, from 23 to 28 November 2021. It had a total prize of US$850,000.
The 2021 Indonesia Open was the ninth tournament according to the 2021 BWF World Tour after many tournaments got canceled due to the COVID-19 pandemic earlier of the year. It was a part of the Indonesia Open, which has been held since 1982 and was organized by the Badminton Association of Indonesia with sanction from BWF.[1] It was also part of the Indonesia Badminton Festival in which three tournaments; the Indonesia Masters and World Tour Finals, together with this tournament were held at the same venue, played back-to-back.[2]
This international tournament was held at Bali International Convention Center in Nusa Dua, Badung Regency, Bali, Indonesia.[1]
Below is the point distribution table for each phase of the tournament based on the BWF points system for the BWF World Tour Super 1000 event.[3]
The total prize money for this tournament was US$850,000. The distribution of the prize money was in accordance with BWF regulations.[1]
| Event | Winner | Finalist | Semi-finals | Quarter-finals | Last 16 | Last 32 | |
| Singles | $59,500 | $28,900 | $11,900 | $4,675 | $2.550 | $850 | |
| Doubles | $62,900 | $29,750 | $11,900 | $5,312.50 | $2,762.50 | $850 |
Kento Momota (second round)
Ng Ka Long (first round) Akane Yamaguchi (quarter-finals)
Ratchanok Intanon (final)
P. V. Sindhu (semi-finals)
An Se-young (champion) Pornpawee Chochuwong (semi-finals)
Michelle Li (first round) Busanan Ongbamrungphan (second round) Sayaka Takahashi (second round) Chirag Shetty / Satwiksairaj Rankireddy (semi-finals)
Vladimir Ivanov / Ivan Sozonov (first round) Kim So-yeong / Kong Hee-yong (quarter-finals) Jongkolphan Kititharakul / Rawinda Prajongjai (semi-finals) Nami Matsuyama / Chiharu Shida (champions) Mayu Matsumoto / Ayako Sakuramoto (quarter-finals) Dechapol Puavaranukroh / Sapsiree Taerattanachai (champions) Yuta Watanabe / Arisa Higashino (final)
Thom Gicquel / Delphine Delrue (first round) Tang Chun Man / Tse Ying Suet (quarter-finals)