The high commissioner of Australia to Brunei is an officer of the Australian Department of Foreign Affairs and Trade and the head of the High Commission of the Commonwealth of Australia in Brunei.

The position has the rank and status of an ambassador extraordinary and plenipotentiary and is currently held by Luke Arnold since January 2022.

[1] The reporting responsibility for the British Protectorate of Brunei was originally held by the Australian office in Singapore, with a "Commissioner for Malaya and South-East Asia" appointed in 1946.

[4] On 30 July 1979, the Australian high commissioner to Malaysia in Kuala Lumpur, was appointed as the non-resident Commissioner to Brunei, with a stated purpose to "facilitate contacts and closer cooperation with the Government of Brunei during the period leading up to Brunei's full independence in 1983".

[6][7] When Brunei gained its independence, the Australian mission became a High Commission.