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.

Chittagong District, renamed the Chattogram District, is a district located in south-eastern Bangladesh. It is a part of the Chittagong Division. The port city of Chittagong, which is the second largest city in Bangladesh, is located within this district.