Pirojpur is a district (zilla) in south-western Bangladesh. It is a part of Barisal Division.

Barisal Division is one of the eight administrative divisions of Bangladesh. Located in the south-central part of the country, it has an area of 13,644.85 km2 (5,268.31 sq mi), and a population of 9,100,102 at the 2011 Census. It is the least populous Division in Bangladesh. It is bounded by Dhaka Division on the north, the Bay of Bengal on the south, Chittagong Division on the east and Khulna Division on the west. The administrative capital, Barisal city, lies in the Padma River delta on an offshoot of the Arial Khan River. Barisal division is criss-crossed by numerous rivers that earned it the nickname Dhan-Nodi-Khal, Ei tin-e Borishal.