The Brunei revolt or the Brunei rebellion of 1962 was a December 1962 insurrection in the British protectorate of Brunei by opponents of its monarchy and its proposed inclusion in the Federation of Malaysia who wanted to establish a republic. The insurgents were members of the TNKU, a militia supplied by Indonesia and linked to the left-wing Brunei People's Party (BPP), which favoured a North Borneo Federation. The TNKU began co-ordinated attacks on the oil town of Seria, on police stations, and on government facilities around the protectorate. The revolt began to break down within hours, having failed to achieve key objectives such as the capture of Brunei Town and Sultan Omar Ali Saifuddien III. The revolt influenced the Sultan's 1963 decision not to join Malaysia. It is seen as one of the first stages of the Indonesia–Malaysia confrontation.

Brunei, officially State of Brunei, and formally Brunei Darussalam, is a country in Southeast Asia, situated on the northern coast of the island of Borneo. Apart from its coastline on the South China Sea, it is completely surrounded by the Malaysian state of Sarawak, with its territory bifurcated by the Sarawak district of Limbang. Brunei is the only sovereign state entirely on Borneo; the remainder of the island is divided between its multi-landmass neighbours of Malaysia and Indonesia. As of 2023, the country had a population of 455,858, of whom approximately 150,000 resided in the capital and largest city of Bandar Seri Begawan. Its official language is Malay and Islam is the state religion of the country, although other religions are nominally tolerated. The government of Brunei is an absolute monarchy ruled by the Sultan of Brunei, and it implements a fusion of English common law and jurisprudence inspired by Islam, including sharia.