Purainiya is a village in Nautanwa tehsil in district of Mahrajganj, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Purainiya was 2,572 which includes 1,366 males and 1,206 females. Purainiya covers 318.06 ha area. Pincode of Purainiya is N/A.