Dumar Diha is a village in Dudhi tehsil in district of Sonbhadra, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Dumar Diha was 3,394 which includes 1,817 males and 1,577 females. Dumar Diha covers 658.55 ha area. Pincode of Dumar Diha is 231208.