Alagapuri is a village in Manapparai tehsil in district of Tiruchirappalli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Alagapuri was 3,187 which includes 1,572 males and 1,615 females. Alagapuri covers 983.97 ha area. Pincode of Alagapuri is 621314.