Koirganwan is a village in Jogapatti tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Koirganwan was 2,281 which includes 1,192 males and 1,089 females. Koirganwan covers 218.1 ha area. Pincode of Koirganwan is N/A.