Semarnar is a village in Naugarh tehsil in district of Siddharth Nagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Semarnar was 1,176 which includes 856 males and 320 females. Semarnar covers 115.26 ha area. Pincode of Semarnar is N/A.