Agarathirunallur is a village in Kodavasal tehsil in district of Thiruvarur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Agarathirunallur was 1,619 which includes 802 males and 817 females. Agarathirunallur covers 296.09 ha area. Pincode of Agarathirunallur is 610104.