Sonkhar is a village in Domariyaganj tehsil in district of Siddharthnagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Sonkhar was 1,138 which includes 544 males and 594 females. Sonkhar covers 213.18 ha area. Pincode of Sonkhar is N/A.