Mahadewa Raja is a village in Naugarh tehsil in district of Siddharthnagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Mahadewa Raja was 155 which includes 77 males and 78 females. Mahadewa Raja covers 21.3 ha area. Pincode of Mahadewa Raja is N/A.