Alagapuri is a village in Thuraiyur tehsil in district of Tiruchirappalli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Alagapuri was 3,938 which includes 1,908 males and 2,030 females. Alagapuri covers 1210.4 ha area. Pincode of Alagapuri is 621210.