Duwarsai is a village in Noamundi tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Duwarsai was 510 which includes 259 males and 251 females. Duwarsai covers 358 ha area. Pincode of Duwarsai is 833218.