The Thiruvanvandoor Mahavishnu Temple is a Hindu temple dedicated to Vishnu and located in Thiruvalla District, Kerala, South India. Constructed in the Kerala fashion of architecture, the temple is glorified in the Divya Prabandha, the early medieval Tamil canon of the Azhwar saints from the sixth–ninth centuries AD. It is one of the 108 Divyadesam committed to Krishna, an avatar of Vishnu, who is worshipped as Paambanaiappan. The nearest railway station to the temple is placed in Chengannur, whilst the closest airport is Trivandrum International Airport.
It is one of the 5 ancient shrines within the Chengannur vicinity of Kerala, linked with the legend of Mahabharata, where the 5 Pandavas are believed to have built one temple every; Thrichittatt Maha Vishnu Temple by way of Yudhishthira, Puliyur Mahavishnu Temple by means of Bheema, Aranmula Parthasarathy Temple with the aid of Arjuna, Thiruvanvandoor Mahavishnu Temple with the aid of Nakula and Thrikodithanam Mahavishnu Temple via Sahadeva. The temple is open from 4:00 am to 11:00 am and 5 pm to 8 pm and is administered by way of Travancore Devaswom Board of the Government of Kerala.