Mahadewdewla is a village in Sona Rai Tharhi tehsil in district of Deoghar, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Mahadewdewla was 237 which includes 114 males and 123 females. Mahadewdewla covers 129 ha area. Pincode of Mahadewdewla is 814150.