Ettumanoor Mahadeva temple is an ancient Shiva temple in Kottayam, Kerala, India. Temple tradition has it that the Pandavas and the sage Vyasa had worshipped at this temple. It is believed that at this place [ooru] Lord Siva appeared in Eight [ Ettu] different forms [ maanam] and hence the name Ettumanoor.

The present temple building, with its gopuram and the fortress around it, was reconstructed in 717 ME (1542 AD). There are Dravidian mural paintings on the walls inside and outside of the main entrance. The fresco of Pradosha Nritham (Dance of Shiva) is one of the finest wall paintings in India.

Temple is administered by Travancore Devaswom Board