Olundiyappattu is a village in Vanur tehsil in district of Viluppuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Olundiyappattu was 1,831 which includes 884 males and 947 females. Olundiyappattu covers 824.78 ha area. Pincode of Olundiyappattu is 605109.