Postal codes in Bangladesh are assigned to all areas in the country. And there is only five General Post Offices in Bangladesh, They are: Central General Post office, Dhaka GPO assigned Code is 1000, Metropolitan General Post office, Metropolitan Dhaka assigned code is 1100, Eastern General Post office Chattogram GPO assigned Code 4000, Northern General Post office, Rajshahi GPO assigned Code 6000 and Southern General Post office, Khulna GPO assigned Code is 9000.

The post code system was introduced in Bangladesh on 22 December 1986.