Salkhan is a village in Robertsganj tehsil in district of Sonbhadra, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Salkhan was 10,552 which includes 5,561 males and 4,991 females. Salkhan covers 995.77 ha area. Pincode of Salkhan is 231205.