Thillaiyadi is a village in Tharangambadi tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thillaiyadi was 3,879 which includes 1,890 males and 1,989 females. Thillaiyadi covers 591.22 ha area. Pincode of Thillaiyadi is 609310.