Arwatanr is a village in Birni tehsil in district of Giridih, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Arwatanr was 207 which includes 113 males and 94 females. Arwatanr covers 71.83 ha area. Pincode of Arwatanr is 825324.