Sonbhadar is a village in Sonbhadra Banshi Suryapur tehsil in district of Arwal, Bihar, India. As per the data provided by Census of India in 2011, total population of Sonbhadar was 3,715 which includes 1,888 males and 1,827 females. Sonbhadar covers 341 ha area. Pincode of Sonbhadar is 804419.