Ottankadu is a village in Pattukkottai tehsil in district of Thanjavur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Ottankadu was 2,675 which includes 1,339 males and 1,336 females. Ottankadu covers 409.41 ha area. Pincode of Ottankadu is 614803.