Gopalpur Mafi is a village in Bairia tehsil in district of Ballia, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Gopalpur Mafi was 425 which includes 221 males and 204 females. Gopalpur Mafi covers 20.25 ha area. Pincode of Gopalpur Mafi is N/A.