Mathnag Nath 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 Mathnag Nath was 373 which includes 197 males and 176 females. Mathnag Nath covers 8.06 ha area. Pincode of Mathnag Nath is N/A.