Gangasagar is a village in Sagar tehsil in district of South Twenty Four Parganas, West Bengal, India. As per the data provided by Census of India in 2011, total population of Gangasagar was 10,340 which includes 5,228 males and 5,112 females. Gangasagar covers 1225.56 ha area. Pincode of Gangasagar is 743606.