Alagapuram is a village in Udayarpalayam tehsil in district of Ariyalur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Alagapuram was 5,334 which includes 2,672 males and 2,662 females. Alagapuram covers 1219.76 ha area. Pincode of Alagapuram is 608901.