The constituency was created for the first general elections in newly independent Bangladesh, held in 1973. Ahead of the
2008 general election, the
Election Commission redrew constituency boundaries to reflect population changes revealed by the
2001 Bangladesh census. The 2008 reapportionment added one seat to Chittagong City and altered the boundaries of the three other seats in the city, including this one. Ahead of the
2014 general election, the Election Commission renumbered the seat for
Sandwip Upazila from Chittagong-16 to Chittagong-3, bumping up by one the suffix of the former constituency of that name and the higher numbered constituencies in the district. Thus Chittagong-9 covers the area previously covered by Chittagong-8. Previously Chittagong-9 encompassed
Chittagong City Corporation wards 11 through 14, and 24 through 26, and part of ward 8. In the
2018 general election, the constituency was one of six chosen by lottery to use
electronic voting machines. == Members of Parliament ==