Mayuranathaswamy Temple, Mayiladuthurai or Mayuranathar Temple is a Hindu temple in the town of Mayiladuthurai (formerly known as Mayavaram or Mayuram) in Tamil Nadu, India. The temple is dedicated to Lord Mayuranathaswamy, a form of Shiva, and has given its name to the town itself.
The main icon is a lingam and the presiding deity is called Mayuranathar because the Hindu goddess Parvathi worshipped Shiva here in the form of a mayura.
On the day of the new moon in the Tamil month of Aippasi (November–December), religious Hindus have a ceremonial bath in the temple tank as it is believed to purify them from sins. An annual dance festival called the Mayura Natyanjali festival is celebrated within the precincts of the temple each year.
Thiruvayyaru, Mayiladuthurai, Thiruvidaimaruthur, Thiruvenkadu, Chayavanam and Srivanchiyam are considered equivalents of Kasi. Like in Kasi, where the city is centered around Kashi Vishwanath Temple, the temples in these towns along the banks of river Cauvery, namely, Aiyarappar temple in Thiruvaiyaru, Mahalingeswarar temple in Thiruvidaimarudur, Mayuranathaswamy temple in Mayiladuthurai, Chayavaneswarar temple in Sayavanam, Swetharanyeswarar temple in Thiruvenkadu, Srivanchinadhaswamy Koil in Srivanchiyam are the centerpieces of the towns. The temple is counted as one of the temples built on the banks of River Kaveri.
The temple is one of the canonical shrines of the 275 Paadal Petra Sthalams – Shiva temples glorified in the early medieval Tevaram poems by Tamil Saivite Nayanar Tirugnanasambandar.