Dumarjhara is a village in Gawan tehsil in district of Giridih, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Dumarjhara was 255 which includes 128 males and 127 females. Dumarjhara covers 597.65 ha area. Pincode of Dumarjhara is 815313.