Sardhawatanr is a village in Chauparan tehsil in district of Hazaribagh, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Sardhawatanr was 362 which includes 190 males and 172 females. Sardhawatanr covers 654.59 ha area. Pincode of Sardhawatanr is 825406.