Mannargudi is a town in Thiruvarur district in the South Indian state of Tamil Nadu. It is the headquarters of the Mannargudi Taluk. The town is located at a distance of 20km from the district headquarters Tiruvarur and 310 km from the state capital Chennai. Mannargudi is known for the Rajagopalaswamy temple, a prominent Vaishnavite shrine.Mannargudi is administered by a municipality established in 1866. As of 2011, the municipality covered an area of and had a population of 66,999. Mannargudi comes under the Mannargudi assembly constituency which elects a member to the Tamil Nadu Legislative Assembly once every five years and it is a part of the Nagappattinam constituency which elects its Member of Parliament (MP) once in five years. Roadways are the major mode of transportation to the town and it also has rail connectivity. The nearest seaport, Nagapattinam Port, is located 52 km (32 mi) from Mannargudi, while the nearest airport, Tiruchirappalli International Airport, is located 97 km (60 mi) from the town.