The Kurmanathaswamy temple, also known as the Kurmanatha temple, Srikurma or Srikurmam temple, is a Hindu temple dedicated to Kurma – the second avatar of Vishnu. It is located in Srikurmam village, Srikakulam district in Andhra Pradesh, India. According to Prapannamrutam and earliest inscription of the temple, In saka 1035 CE Anantavarman Chodaganga Deva of Eastern Ganga Dynasty of Odisha converted this temple to a Vaishnava khetra from a Siva temple.The temple was Built before 11th-century CE in a fusion architecture of kalinga Architecture and Dravidian Architecture. The temple's perambulatory were constructed by Eastern Ganga Dynasty king Anangabhima Deva III, and it is dedicated to Vishnu as Kurmanathaswamy and his consort Lakshmi as Kurmanayaki. The temple has century old Orissan Pattachitra style mural paintings in side wall of pradakshina mandapa.

Srikurmam is the only known pre-14th-century Indian temple that is dedicated to the Kurma avatar. The sanctum of Kurmanatha temple has both a tortoise image and the anthropomorphic Vishnu with Lakshmi. The temple was an important centre of Vaishnavism in the medieval period along with Simhachalam. Later Naraharitirtha, a disciple of Madhvacharya, was instrumental in making Srikurmam the seat of Vishnavite religious activities. The temple has two dhvajasthambas, 108 ekasila (single-stone) pillars, with none resembling each other. These bear numerous inscriptions. A tortoise park has been built within the temple to honor and conserve the adult and young star tortoises. The temple has primarily Vaishnava iconography and murals, but also reverentially includes Shaiva (Ganesha, Shiva) and Shakti (Lakshmi, Durga) icons.

Srikurmam follows both Shaivite and Vaishnavite traditions of worship. Four daily rituals and four annual festivals are celebrated in Srikurmam, out of which the three-day Dolotsavam is the major one. Gajapathi Rajus of Vizianagaram are the trustees of the temple, which is maintained and administered by the Hindu Religious and Endowment Board of the Government of Andhra Pradesh. The Indian postal department issued a stamp featuring the temple on 11 April 2013.

The temple is situated in the Gara mandal of the Srikakulam district, which is located at a distance of 130 kilometres (81 mi) from Visakhapatnam. It is one of the Indian temples where the Hindu deity Vishnu is worshipped in the form of a tortoise (the others being Sri Gaviranganatha Swami temple at Gavirangapura, Chitradurga, Karnataka and Sri Kurma Varadaraja Swami temple at Kurmai, Chittoor, Andhra Pradesh). Srikurmam is 15 kilometres (9.3 mi) away from Srikakulam town and 12.5 kilometres (7.8 mi) away from the Suryanarayana temple, Arasavalli. Inscriptional history of the temple begins in the 11th-12th centuries. The temple is popular among the Tamil diaspora as well because it is a Vaishnavite temple. Ramanuja's disciples established Vaishnavism in the temple with the support of Kalinga king Anantavarman Chodaganga, the eastern Ganga king. After this incident, a group of devadasis were employed to sing and dance daily before the deity in the morning and evening.

Srikurmam was regarded as an important centre of Vaishnavism in the medieval period along with Simhachalam and others. It was also regarded as the Gurupitha (sacred place of the master) of the Ganga kings of Utkala. Naraharitirtha, the disciple of Madhvacharya, was instrumental in making Srikurmam the seat of Vishnavite religious activities. He also defended the place from an attack of the Sabaras, a group of savage inhabitants of the Ganjam forests. Srikurmam influenced the kings, officials, and Vaishnavite devotees to change their names in accordance with the religious faith they followed. Due to his close association with the eastern Ganga kings, Naraharitirtha created the office of Bhoga Pariksha (religious head) with the aim of having the successive Madhwa saints supervise religious matters and pray for the welfare of the royal family and kingdom. Naraharitirtha later built a temple dedicated to Yogananda Narasimha in front of Srikurmam. The temple inscriptions mention Narasimha Dasa Pandita and Purushottama Deva as the Bhoga Parikshas. Currently, Srikurmam is under the trusteeship of the Gajapathi Rajus of Vizianagaram.

During the reign of king Swetha Chakravarthi, this area was referred to as Swetha Giri. Swetha Chakravarthi's wife Vishnu Priya was a devotee of Vishnu. When she was observing a fast on an Ekadasi day, Swetha Chakravarthi approached her with the intention of making love. When she refused, saying the time was not ideal, the king became adamant. She prayed to Vishnu, who created a stream of water, separating the couple. Swetha Chakravarthi was carried away in the ensuing flood and Vishnu Priya followed him to the hilly terrains of Swetha Giri. The sage Narada initiated an upadesam of the Kurma Narayana mantra and asked the king to pray to Vishnu using it. By the time Vishnu appeared in the form of the Kurma (tortoise) avatar, the king's health had deteriorated. Vishnu then made his Sudarshana Chakra make an impression in the nearby land, forming a lake. Swetha Chakravarthi bathed in the lake and regained his health, after which it was referred to as Swetha Pushkarani. Upon the king's request, Vishnu manifested as the deity of Kurmanatha. According to the Padma Purana, Brahma officiated the celestial rituals and consecrated the deity with Gopala Yantra. Vishnu is worshipped as Kurmanatha Swamy or Kurma Narayana, along with his consort Lakshmi, who is referred to as Kurmanayaki.

Later, a tribal king visited the Swetha Pushkarani and was impressed with it. After learning about the story of its origin from Swetha Chakravarthi, the tribal king constructed a tank around the lake and began worshipping the deity regularly. The tribal king used to stay in Sage Sampangi's monastery, which was situated in the Western side of the temple. Upon the king's request, the deity started facing west. The sage Durvasa visited the temple later with his disciples; the event of his arrival was considered significant. Rama's sons Lava and Kusha were said to have worshipped Vishnu as Kurmanatha in Srikurmam. In Dvapara Yuga, Balarama visited the temple and was denied entry by Bhairava, who was serving as the temple's Kshetrapala (guardian deity). Infuriated, Balarama threw Bhairava away from the temple premises. Kurmanatha learned of this and gave Balarama permission to enter the temple. Balarama, in resentment, cursed that Srikurmam would be the only temple where Vishnu would be worshipped in the form of Kurma Narayana. Legends also say that upon Vishnu's request, Anjaneya agreed to guard the temple.