Hathiwanwan is a village in Sidhaw tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Hathiwanwan was 1,599 which includes 819 males and 780 females. Hathiwanwan covers 467.4 ha area. Pincode of Hathiwanwan is 845405.