Qasr-e Yaqub (Persian: قصريعقوب, also romanized as Qaşr-e Ya‘qūb and Qasr-i-Yā‘qūb; also known as Qaşr-e Qal‘eh Ya‘qūb) is a village in Khorrami Rural District, in the Central District of Khorrambid County, Fars Province, Iran. At the 2006 census, its population was 334, in 83 families.