Comilla district and Tripura (India) on the north, Noakhali and Chittagong districts on the south, Tripura State of India on the east, Noakhali district on the west.

Feni district was established in 1984. It consists of two municipality, six upazilas, 45 union parishads, 540 mouzas, wards 27, mahallas 51 and 570 villages. The Upazilas are chhagalnaiya, daganbhuiyan, feni sadar, parshuram, Phulgazi and sonagazi; Municipality is Feni Sadar.

Chhagalnaiya Upazila, Daganbhuiyan Upazila, Feni Sadar Upazila, Parshuram Upazila, Phulgazi Upazila, Sonagazi Upazila