Jemaah Islamiah  (Arabic: الجماعة الإسلامية, al-Jamāʿat ul-Islāmíyatu, meaning "Islamic Congregation", frequently abbreviated JI), is a Southeast Asian militant Islamic organization. It wants the creation of an Islamic caliphate (Daulah Islamiyah)  in Southeast Asia. It would include Indonesia, Malaysia, the southern Philippines, Singapore and Brunei. JI was added to the United Nations 1267 Committee's list of terrorist organizations linked to al-Qaeda or the Taliban on 25 October 2002 under UN Security Council Resolution 1267.
- Other transliterations and names include Jemaah Islamiyah, Jemaa Islamiyah, Jema'a Islamiyya, Jema'a Islamiyyah, Jema'ah Islamiyah, Jema'ah Islamiyyah, Jemaa Islamiya, Jemaa Islamiyya, Jemaah Islamiyya, Jemaa Islamiyyah, Jemaah Islamiyyah, Jemaah Islamiyyah, Jemaah Islamiya, Jamaah Islamiyah, Jamaa Islamiya, Jemaah Islam, Jemahh Islamiyah, Jama'ah Islamiyah and Al-Jama'ah Al Islamiyyah.
- Zalman, Amy. "Jemaah Islamiyah (JI)". About.com. http://terrorism.about.com/od/groupsleader1/p/Jemaah_Islamiya.htm. Retrieved 2008-08-01.
- Elena Pavlova. "From Counter-Society to Counter-State: Jemaah Islamiah According to Pupji, p. 11." (PDF). The Institute of Defence and Strategic Studies. http://www.ntu.edu.sg/rsis/publications/WorkingPapers/WP117.pdf.
- JI is also believed to have something to do with the insurgent violence in southern Thailand. "Conspiracy of Silence: Who is Behind the Escalating Insurgency in Southern Thailand?"
- "UN Press Release SC/7548". http://www.un.org/News/Press/docs/2002/SC7548.doc.htm.