Dhumnagiar is a village in Narkatiaganj tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Dhumnagiar was 5,288 which includes 2,776 males and 2,512 females. Dhumnagiar covers 196.7 ha area. Pincode of Dhumnagiar is N/A.