Koriahi Urf Kalyanpatti is a village in Sursand tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Koriahi Urf Kalyanpatti was 4,263 which includes 2,151 males and 2,112 females. Koriahi Urf Kalyanpatti covers 251.8 ha area. Pincode of Koriahi Urf Kalyanpatti is 843331.