Ala-ud-din Husain Shah (Bengali: আলাউদ্দিন হোসেন শাহ (1494–1519) was an independent late medieval Sultan of Bengal, who founded the Hussain Shahi dynasty. He became the ruler of Bengal after assassinating the Sultan, Shams-ud-Din Muzaffar Shah, whom he had served under as wazir. After his death in 1519, his son Nusrat Shah succeeded him. The reigns of Husain Shah and Nusrat Shah are generally regarded as the "golden age" of the Bengal sultanate.