Chau Siwan is a village in Musahri tehsil in district of Muzaffarpur, Bihar, India. As per the data provided by Census of India in 2011, total population of Chau Siwan was 1,114 which includes 627 males and 487 females. Chau Siwan covers 74 ha area. Pincode of Chau Siwan is 843113.