Indian State of Tripura on the north, Langadu upazila on the south, Baghaichhari upazila on the east, Tripura (India), Panchhari and Khagrachhari Sadar upazilas on the west.

Dighinala thana was established in 1923 and was turned into an upazila in 1985. The upazila consists of five union parishads, 20 mouzas and 140 villages.

Dighinala Upazila is located in Khagrachhari District. Upazilla(s)/Thana(s) in Khagrachhari are Dighinala Upazila, Khagrachhari Sadar Upazila, Lakshmichhari Upazila, Mahalchhari Upazila, Manikchhari Upazila, Matiranga Upazila, Panchhari Upazila, Ramgarh Upazila.