Meghalaya state of India on the north, Chhatak upazila on the south and east, Sunamganj Sadar upazila on the west.

Dowarabazar thana, now an upazila, was established in 1976. It consists of 7 union parishads, 166 mouzas and 294 villages.

Dowarabazar Upazila is located in Sunamganj District. Upazilla(s)/Thana(s) in Sunamganj are Bishwamvarpur Upazila, Chhatak Upazila, Derai Upazila, Dharmapasha Upazila, Dowarabazar Upazila, Jagannathpur Upazila, Jamalganj Upazila, Sullah Upazila, Sunamganj Sadar Upazila, Tahirpur Upazila.