Tach Armachiho is one of the woredas in the Amhara Region of Ethiopia. This woreda is named after "Armachiho", a province in northwestern Ethiopia along the border with Sudan and south of the Tekezé River. Part of the Semien Gondar Zone, Tach Armachiho is bordered on the south by Lay Armachiho and Chilga, on the southwest by Metemma, on the west by Mirab Armachiho, on the north by the Tegeda, on the east by Dabat, and on the southeast by Wegera. Tach Armachiho was part of former Sanja woreda.