Alwarthirunagiri is a panchayat town in Thoothukudi region in the province of Tamil Nadu, India. It is alongside Srivaikuntam on the Tirunelveli - Tiruchendur Highway, Tamil Nadu, southern India. It's around 31 km from Tirunelveli and 29 km from Tiruchendur, on the banks of the waterway Tamirabarani. Alwarthirunagiri is the origin of alwar holy person Nammalvar. The sanctuary is delegated a "Divya Desam", the 108 sanctuaries of Sri Narayana worshipped by the 12 writer holy people, or Alwars.