Olaiyathur is a village in Katpadi tehsil in district of Vellore, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Olaiyathur was 770 which includes 373 males and 397 females. Olaiyathur covers 164.83 ha area. Pincode of Olaiyathur is 632202.