Mannargudi is a town in Thiruvarur district in the Indian state of Tamil Nadu. It is the headquarters of the Mannargudi taluk. The town is located at a distance of 28ย km (17ย mi) from the district headquarters Thiruvarur, 12ย km from Needamangalam, 36ย km from Kumbakonam, 40ย km from Thanjavur, and 310ย km (190ย mi) from the state capital Chennai. Mannargudi is known for the Rajagopalaswamy temple, a prominent Vaishnavite shrine.