Meghalaya State of India on the north, Jamalganj and Dharmapasha upazilas on the south, Bishwamvarpur on the east and Dharmapasha on the west.

Tahirpur thana, now an upazila, was established in 1924. It consists of 7 union parishads, 136 mouzas and 239 villages.

Tahirpur 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.

Remnants of the residence of Raja Bijoy Singh (16th century).