Jemaah Islamiyah is a Southeast Asian Islamist militant group based in Indonesia, which is dedicated to the establishment of an Islamic state in Southeast Asia. On 25 October 2002, immediately following the JI-perpetrated Bali bombing, JI was added to the UN Security Council Resolution 1267 as a terrorist group linked to Al-Qaeda or the Taliban.

JI is a transnational organization with cells in Indonesia, Singapore, Malaysia and the Philippines.^[78] In addition to al-Qaeda, the group is also thought to have alleged links to the Moro Islamic Liberation Front^[78] and Jamaah Ansharut Tauhid, a splinter cell of the JI which was formed by Abu Bakar Baasyir on 27 July 2008. The group has been designated as a terrorist group by the United Nations, Australia, Canada, China, Japan, the United Kingdom and the United States.

On 16 November 2021, Indonesian National Police launched a crackdown operation, which revealed that the group operated in disguise as a political party, Indonesian People's Da'wah Party. The revelation shocked many people, as it was the first time in Indonesia that a terrorist organization disguised itself as a political party and attempted to intervene and participate in the Indonesian political system.^[79]