Ottainatham is a village in Ottapidaram tehsil in district of Thoothukkudi, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Ottainatham was 2,126 which includes 1,025 males and 1,101 females. Ottainatham covers 1326.29 ha area. Pincode of Ottainatham is 628302.