Chiagaon is a village in Pothia tehsil in district of Kishanganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Chiagaon was 2,575 which includes 1,333 males and 1,242 females. Chiagaon covers 342.26 ha area. Pincode of Chiagaon is 855117.