Sethur is a village in Thirunallar Taluk tehsil in district of Karaikal, Puducherry, India. As per the data provided by Census of India in 2011, total population of Sethur was 3,890 which includes 1,941 males and 1,949 females. Sethur covers 575.32 ha area. Pincode of Sethur is 609601.