Mahanuwa is a village in Domariyaganj tehsil in district of Siddharthnagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Mahanuwa was 1,255 which includes 635 males and 620 females. Mahanuwa covers 158.06 ha area. Pincode of Mahanuwa is N/A.