The following is a list of people who converted to Islam from a different religion or no religion. This article addresses only past professions of faith by the individuals listed, and is not intended to address ethnic, cultural, or other considerations. Such cases are noted in their list entries. The list is categorized alphabetically with their former religious affiliation, where known.
- Abu Omar al-Shishani – former ISIS commander, converted to Islam from Georgian Orthodoxy
- Aminah Assilmi – former Southern Baptist preacher who converted to Islam while converting Muslims to Christianity.
- Hamza Ali Abbasi – former Pakistani actor, reverted to Islam from atheism
- Kareem Abdul-Jabbar – retired basketball player & the NBA’s all-time leading scorer.
- Ahmed Abdullah – American jazz trumpeter
- Noor Hisham Abdullah – Malaysian Director-General of Health in leading the fight against the COVID-19 pandemic; born Yew Ming Seong
- Thomas J. Abercrombie – photographer and writer for National Geographic
- Hasan Akbar (born Mark Fidel Kools) – American citizen, and Sergeant, diagnosed with psychiatric problems, later sentenced to death for an attack of resentment
- Shaheed Akbar (a.k.a. The Jacka) – American rapper
- Akhenaton – French rapper and producer; born Philippe Fragione
- Baba Ali – Iranian-born American film developer, games developer, and businessman
- Muhammad Ali – professional boxer, activist, and philanthropist.Muhammad Ali
- Sadeq Ali (born Sri Gaur Kishore Sen) – Bengali author
- Nicolas Anelka – French football manager and former player
- Lewis Arquette – American actor; father of actors David, Rosanna, Patricia, Alexis, and Richmond Arquette; son of Cliff Arquette
- Muhammad Asad – Austro-Hungarian born Deputy Secretary in the Foreign Ministry of Pakistan, known for an English Translation of Quran
- Ziaur Rahman Azmi (born Banke Lal) – author, scholar, professor and former Dean of the Department of Hadith at Islamic University of Madinah
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