Gudarganwan is a village in Matihani tehsil in district of Begusarai, Bihar, India. As per the data provided by Census of India in 2011, total population of Gudarganwan was 3,603 which includes 1,889 males and 1,714 females. Gudarganwan covers 185 ha area. Pincode of Gudarganwan is 851129.