Bani Zeid (Arabic: بني زيد‎‎) is a Palestinian town in the Ramallah and al-Bireh Governorate in the north-central West Bank, located 27 kilometers (17 mi) northwest of Ramallah, about 45 kilometers northwest of Jerusalem and about 6 kilometers (3.7 mi) southwest of Salfit. A town of over 5,500 inhabitants, Bani Zeid was founded when the villages of Deir Ghassaneh and Beit Rima merged to form a municipality in 1966 during Jordanian rule. The town owes its name to the Arab tribe that was granted the area as a fief by the Ayyubid sultan Saladin in the 12th century for having served in the Muslim army during the first Crusades. It was settled by members of the tribe alongside the native fellahin ("peasantry") during the reign of Mamluk sultan Baibars in the mid-13th century. During Ottoman rul