The Nellaiappar Temple is a Hindu temple dedicated to the deity Shiva, located in Tirunelveli, a city in the South Indian state of Tamil Nadu. Shiva is worshipped as Nellaiappar represented by the lingam and his consort Parvati is depicted as Kanthimathi Amman. The deity Vishnu is also worshipped here, having witnessed their wedding according to legend. Hence, this temple is regarded as an abhimana kshetram of Vaishnavism. The temple is located on the northern banks of Thamirabarani River in Tirunelveli district. The presiding deity is revered in the 7th century Tamil Saiva canonical work, the Tevaram, written by Tamil saint poets known as the nayanmars and classified as Paadal Petra Sthalam.

Tirunelveli, also known as Nellai and historically as Tinnevelly, is a major city in the Indian state of Tamil Nadu. It is the administrative headquarters of the Tirunelveli District. It is the fourth-largest municipal corporation in the state after Chennai, Coimbatore, and Madurai. Tirunelveli is located 624 km (388 mi) southwest of the state capital Chennai, 58 km (36 mi) away from Thoothukudi, and 73 km (45 mi) from Kanyakumari. The downtown is located on the west bank of the Thamirabarani River; its twin Palayamkottai is on the east bank. Palayamkottai is called the Oxford of South India as it has many schools and colleges. It has several important government offices.