8°16′03″N 77°40′38″E / 8.2676386°N 77.6771915°E Radhapuram taluk is a taluk of Tirunelveli district of the Indian state of Tamil Nadu. The headquarters is the town of Radhapuram. Radhapuram is also a legislative assembly constituency in Tirunelveli district. The constituency has been in existence since 1957 election. This taluk has the longest coastline. The Chettikulam beach is almost 3 km which lies in straight line. The total land area is of 31.63 square kilometer and has a population of around 8000 with male population being the higher. North panakudi is the nearest railway station to Radhapuram.