The constituency centres on the southern part of Kolkata in West Bengal.
Considered to be a bastion of the Trinamool Congress, it has been won by the party since its formation in 1998.
TMC's founder and current chief minister of West Bengal, Mamata Banerjee was the longest holder of the seat.
As per order of the Delimitation Commission in respect of the Delimitation of constituencies in the West Bengal, Kolkata Dakshin Lok Sabha constituency is composed of the following legislative assembly segments from 2009:[2] ^By-Poll A bye election was held in this constituency in 2011 which was necessitated by the resignation of sitting MP Mamata Banerjee and her subsequent election to the State Assembly from the Bhabanipur Assembly constituency.
In the by-election, Subrata Bakshi of Trinamool Congress defeated his nearest rival Ritabrata Banerjee of CPI(M) by 2,30,099 votes.