David ben Boaz (Hebrew: דוד בן בעז, Arabic: Abu Sa'id Dawud ibn Bu'az) was a Karaite Jewish scholar who flourished in the tenth century CE. He is reported to have been the fifth in the line of descent from Anan ben David, the founder of Karaism (he was the son of Boaz ben Jehoshaphat, the son of Jehoshaphat ben Saul, the son of Saul ben Anan, the son of Anan ben David.) He was thus considered resh galuta or exilarch of the Karaite community within the Abbasid Caliphate, in opposition to the rabbinical claimant