Nasirnagar upazila on the north, Brahmanbaria Sadar upazila on the south, Brahmanbaria sadar and Nasirnagar upazilas on the east, Bhairab and Bajitpur upazilas on the west.

Sarail upazila was established in 1990. The upazila consists of 10 union parishads, 76 mouzas and 146 villages.

Sarail Upazila is located in Brahmanbaria District. Upazilla(s)/Thana(s) in Brahmanbaria are Akhaura Upazila, Bancharampur Upazila, Brahmanbaria Sadar Upazila, Kasba Upazila, Nabinagar Upazila, Nasirnagar Upazila, Sarail Upazila.

Hatkhola Jami Mosque (sixteenth century), Sagardighi Mosque at Ariphail (sixteenth century), Twin Grave (under the care of the National Museum), Hatir Pool at Bariura (Mughal period).