Chittagong-15 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh.

Since 6 August 2024, the constituency remains Vacant.

The constituency encompasses Lohagara Upazila and all but six union parishads of Satkania Upazila: Bazlia, Dharmapur, Kalais, Keochia, Khagaria, and Puranagar.

[2] The constituency was created for the first general elections in newly independent Bangladesh, held in 1973.

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.