Satgachia Assembly constituency is located in South 24 Parganas district of West Bengal and forms part of the Diamond Harbour Lok Sabha constituency. It is one of the 294 Assembly constituencies in the state and is classified as a General category seat. The segment is among the seven Assembly constituencies under the Diamond Harbour parliamentary seat. According to the Delimitation Commission’s order, the constituency comprises the entire Bishnupur II community development block along with Burul, Chakmanik, Gaja Poyali, Kamrabad, Naskarpur, Rania and Satgachhia gram panchayats of Budge Budge II community development block. In the 2021 West Bengal Assembly elections, Mohan Chandra Naskar of the All India Trinamool Congress (AITC) won the seat with 1,18,635 votes. He defeated BJP candidate Chandan Pal by a margin of 23,318 votes. In the 2016 Assembly elections, Sonali Guha (Bose) of the AITC secured victory with 1,00,171 votes, defeating CPI(M) candidate Paramita Ghosh by 17,272 votes.