Chittagong-1 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Nurul Amin is the incumbent member of Parliament.
The constituency encompasses the entirety of Mirsharai Upazila, including its main towns, villages, and surrounding rural areas, forming a single administrative and electoral unit.
The constituency was created for the first general elections in newly independent Bangladesh which was held in 1973.
Mosharraf Hossain was re-elected unopposed in the 2014 General Election after opposition parties withdrew their candidacies in a boycott of the election.
Khaleda Zia stood for five seats in the June 1996 general election: Bogra-6, Bogra-7, Feni-1, Lakshmipur-2 and Chittagong-1. After winning all five, she chose to represent Feni-1 and quit the other four, triggering by-elections in them. Mosharraf Hossain was elected in a September 1996 by-election.