Alagapuri is a village in Sankarankoil tehsil in district of Tirunelveli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Alagapuri was 3,405 which includes 1,671 males and 1,734 females. Alagapuri covers 383.52 ha area. Pincode of Alagapuri is 627719.