Keelathayanur is a village in Tirukkoyilur tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Keelathayanur was 1,835 which includes 950 males and 885 females. Keelathayanur covers 155.65 ha area. Pincode of Keelathayanur is 605757.