Gandaul is a village in Satar Kataiya tehsil in district of Saharsa, Bihar, India. As per the data provided by Census of India in 2011, total population of Gandaul was 2,425 which includes 1,273 males and 1,152 females. Gandaul covers 352.4 ha area. Pincode of Gandaul is 852124.