Koothanur is a village in Nannilam tehsil in district of Thiruvarur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Koothanur was 1,363 which includes 676 males and 687 females. Koothanur covers 369.69 ha area. Pincode of Koothanur is 609403.