Thennadar is a village in Vedaranyam tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thennadar was 1,774 which includes 875 males and 899 females. Thennadar covers 707.61 ha area. Pincode of Thennadar is 614714.