Meghalya State of India on the north, Sunamganj Sadar and Jamalganj upazilas on the south, Sunamganj Sadar upazila on the east, Tahirpur and Jamalganj upazilas on the west.

Bishwamvarpur thana was turned into an upazila in 1983. The upazila consists of three union parishads, 59 mouzas and 175 villages.

Bishwamvarpur 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.