Yakub Beg, Yakub Bey, or Ya'qub Beg may refer to:
People Yakub I of Germiyan (died c. 1340), bey of Germiyan Yakub II (died 1429), bey of Germiyan Yakup Bey Muzaka (died 1442), Ottoman sanjak-bey of Albania Yaqub (Aq Qoyunlu) (died 1490), sultan of the Aq Qoyunlu Yakub Beg of Yettishar (c. 1820–1877), emir of Yettishar
Places Yakupbey, Meriç, a village in Edirne Province, Turkey