Dewan Dumariya is a village in Sarath tehsil in district of Deoghar, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Dewan Dumariya was 371 which includes 190 males and 181 females. Dewan Dumariya covers 69.36 ha area. Pincode of Dewan Dumariya is 815353.