Ambassel is one of the woredas of the Amhara Region in Ethiopia, and an amba, or mountain fortress, located in the woreda; the woreda is named for this feature. Located in the Debub Wollo Zone, Ambassel woreda is bordered on the west by the Bashilo which separates it from Tenta, on the north by the Semien Wollo Zone, on the southeast by the Mille River which separates it from Tehuledere, and on the south by Kutaber; the Walano, a tributary of the Bashilo, defines most of its southern border.