The Adi Jagannatha Temple is a South Indian Hindu temple in Thiruppullani, a village in the outskirts of Ramanathapuram in the South Indian state of Tamil Nadu, is dedicated to the Hindu god Vishnu. It is believed that Rama used grass (‘pul’ in Tamil as a pillow (thalai annai in Tamil) to sleep and hence the village attained the name Thiruppullani. Constructed in the Dravidian style of architecture, the temple is glorified in the Divya Prabandha, the early medieval Tamil canon of the Azhwar saints from the 6th–9th centuries CE. It is one of the 108 Divyadesam dedicated to Vishnu, who is worshipped as Adi Jagannatha and his consort Lakshmi as Padmasini.

The temple is believed to have been built during the late 8th century CE, with later contributions from Medieval Cholas, later Pandyas, Sethupathi Kings of Ramnad. As per Hindu legend, Rama is believed to have done penance to worship the god of ocean to seek way to Lanka in grass, giving the name Dharbasayanam to the place. The temple is maintained and administered by the Ramanathapuram Samasthan Devasthanam a Trust under the control of the Ramnad King Sethupathi successor and at present Her Highness the Queen Raja Rajeswari Natchiyar as Hereditary Trustee and the accounts were audited by Hindu Religious and Charitable Endowments Department of the Government of Tamil Nadu.