Dayfa Khatun (Arabic: ضيفة خاتون; died 1242) was Ayyubid princess, and the regent of Aleppo from 26 November 1236 to 1242, during the minority of her grandson An-Nasir Yusuf. She was an Ayyubid princess, as the daughter of Al-Adil, Sultan of Egypt. She married her first cousin, Az-Zahir Ghazi, Emir of Aleppo, which marked the end of the rivalry between the two branches of the family.