During the 19th and 20th centuries under British colonial rule, the territory comprising present-day Bangladesh was administered as the eastern portion of the Bengal Presidency (also called the Presidency of Fort William), one of British India's three original presidential divisions.
| Period | Administrative Configuration |
|---|---|
| 1765–1905 | Bengal Presidency: vast territory including modern Bangladesh, West Bengal, Bihar, Odisha, Assam |
| 1905–1912 | Partition of Bengal: Eastern Bengal & Assam (capital Dhaka) separated from Western Bengal (capital Calcutta) |
| 1912–1947 | Reunited Bengal Presidency; separate provinces of Bihar/Odisha and Assam created |
| 1947 | Partition of India: East Bengal → East Pakistan (Dominion of Pakistan) |
| 1971 | Bangladesh Liberation War → Independent Bangladesh |
On period maps of "British India" or "Indian Empire":
The Bengal Presidency framework shaped:
Understanding the Bengal Presidency is essential for interpreting colonial-era maps, records, and the administrative genealogy of modern Bangladesh.