 The district capital and largest city is Tangkak Town.The district covers Tangkak town, Tanjung Agas, Kesang, Sungai Mati, Serom, Sagil and Bukit Gambir.The district was previously an autonomous sub-district (daerah kecil) covering the north-western part of the Muar district, separated from Muar City proper by the Muar River.