Within the Islamic history of Yemen, Abdallah Fakhr al-Din (Arabic: عبدالله فخرالدين) was the 16th Dai of Tayyibi Isma'ilism (died on 9 Ramadan al-Moazzam 809 AH/16 February 1407 AD, Zimarmar, Yemen). He succeeded the 15th Dai Abbas ibn Muhammad to the religious post.