Brahmanbaria Sadar and Raipura upazilas on the north, Muradnagar upazila on the south, Kasba and Brahmanbaria Sadar upazilas on the east, Bancharampur and Raipura upazilas on the west.

Nabinagar thana was turned into an upazila in 1983. The upazila consists of 19 union parishads, 155 mouzas and 198 villages.

Nabinagar 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.

Nabinagar Math, abandoned Zamindar Bari and Kameni Bala Debi Ananda Ashram.