Sethur is a village in Mayiladuthurai tehsil in district of Nagapattinam, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Sethur was 2,442 which includes 1,191 males and 1,251 females. Sethur covers 451.81 ha area. Pincode of Sethur is 609112.