Bahir Gachhi is a village in Magrahat I 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 Bahir Gachhi was 2,409 which includes 1,254 males and 1,155 females. Bahir Gachhi covers 64.15 ha area. Pincode of Bahir Gachhi is 743375.