Semmangudy is a village in Sirkali tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Semmangudy was 1,692 which includes 856 males and 836 females. Semmangudy covers 232.25 ha area. Pincode of Semmangudy is 609104.