Ballygunge Assembly constituency is one of the 294 assembly constituencies in West Bengal. It is a general category seat situated in Kolkata Corporation district and is one of the seven assembly segments of No. 23 Kolkata Dakshin Lok Sabha constituency. The seat was established in 1951 and forms part of the Kolkata Dakshin parliamentary constituency in Kolkata South district. In the 2021 Vidhan Sabha elections, Subrata Mukherjee of the All India Trinamool Congress (AITC) won the seat with 1,06,585 votes, defeating Lokenath Chatterjee of the Bharatiya Janata Party (BJP) by a margin of 75,359 votes. Following Mukherjee’s demise, a by-election was held in 2022. In the 2022 bypoll, Babul Supriyo of the AITC won with 50,996 votes, defeating Saira Shah Halim of the CPI(M) by a margin of 20,056 votes. Halim secured 30,940 votes, significantly improving the Left’s vote share from 2021. BJP candidate Keya Ghosh finished third with 13,220 votes, while Congress candidate Kamruzzaman Chowdhury secured 5,195 votes. The bypoll recorded a voter turnout of 41.2per cent, lower than the 60.99per cent turnout in the 2021 assembly election. The Trinamool Congress vote share in the bypoll stood at 49.7per cent, compared to nearly 70per cent in 2021, while the CPI(M) increased its vote share to 30.1per cent. Babul Supriyo, a former BJP minister who later joined the Trinamool Congress, was sworn in as an MLA after procedural discussions between the Governor and the Assembly Speaker. In the 2021 West Bengal Legislative Assembly election, Babul Supriyo ran from Tollyganj (Vidhan Sabha constituency) as the Bharatiya Janata Party candidate and lost by more than 50,000 votes. He currently serves as the Minister of Information Technology and Electronics in the Government of West Bengal. Subrata Mukherjee was a veteran politician who won several elections over a five-decade career in West Bengal. His last electoral victory came in the 2021 Assembly elections, when he won the Ballygunge seat as a Trinamool Congress (TMC) candidate.