Alagapuri is a village in Uthamapalayam tehsil in district of Theni, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Alagapuri was 5,184 which includes 2,595 males and 2,589 females. Alagapuri covers 815.39 ha area. Pincode of Alagapuri is 625515.