Nainan is a village in Diamond Harbour II 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 Nainan was 5,144 which includes 2,607 males and 2,537 females. Nainan covers 142.1 ha area. Pincode of Nainan is 743504.