Dewanbir is a village in Sonua tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Dewanbir was 2,425 which includes 1,216 males and 1,209 females. Dewanbir covers 454.31 ha area. Pincode of Dewanbir is 833102.