Dopai is a village in Khuntpani tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Dopai was 1,998 which includes 951 males and 1,047 females. Dopai covers 256 ha area. Pincode of Dopai is 833201.