| Noc: | BRU |
| Nocname: | Brunei Darussalam National Olympic Council |
| Games: | Summer Olympics |
| Year: | 2020 |
| Location: | Tokyo, Japan |
| Competitors: | 2 |
| Sports: | 2 |
| Flagbearer Open: | Muhammad Isa Ahmad |
| Flagbearer Close: | N/A |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Brunei, officially known as Brunei Darussalam, competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, due to the COVID-19 pandemic.[1] This was the nation's eighth appearance at the Summer Olympics since its debut at the 1988 Summer Olympics. Brunei failed to register any athletes in two editions of the Games: 1992 in Barcelona and 2008 in Beijing.
The following is the list of number of competitors in the Games.
| width=180 | Sport | width=55 | Men | width=55 | Women | width=55 | Total |
|---|---|---|---|---|---|---|---|
| Athletics | 1 | 0 | 1 | ||||
| Swimming | 1 | 0 | 1 | ||||
| Total | 2 | 0 | 2 |
See main article: Athletics at the 2020 Summer Olympics and Athletics at the 2020 Summer Olympics – Qualification. Brunei received a universality slot from the World Athletics to send a male track and field athlete to the Olympics.[2]
See main article: article, Swimming at the 2020 Summer Olympics and Swimming at the 2020 Summer Olympics – Qualification. Brunei received a universality invitation from FINA to send a top-ranked male swimmer in his respective individual events to the Olympics, based on the FINA Points System of June 28, 2021.[3]