Brahmanbaria is a district in eastern Bangladesh located in the Chittagong Division. Geographically, it is mostly farmland and is topographically part of the Gangetic Plain. It is bounded by the districts of Kishoreganj and Habiganj to the north, Narsingdi District and Narayanganj to the west, Comilla to the south, and the Indian state of Tripura to the east. It was a part of Comilla District until 15 February 1984.

Chittagong Division, officially known as Chattogram Division, is geographically the largest of the eight administrative divisions of Bangladesh. It covers the south-easternmost areas of the country, with a total area of 34,529.97 km2 (13,332.10 sq mi) and a population at the 2022 census of 33,202,326. The administrative division includes mainland Chittagong District, neighbouring districts and the Chittagong Hill Tracts.