Sithathur 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 Sithathur was 2,536 which includes 1,324 males and 1,212 females. Sithathur covers 178.15 ha area. Pincode of Sithathur is 605701.