Semarahni is a village in Pharenda tehsil in district of Mahrajganj, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Semarahni was 2,646 which includes 1,311 males and 1,335 females. Semarahni covers 236.04 ha area. Pincode of Semarahni is 273162.