Dereraja is a village in Sirauli Gauspur tehsil in district of Bara Banki, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Dereraja was 1,116 which includes 594 males and 522 females. Dereraja covers 204.84 ha area. Pincode of Dereraja is 225415.