Thommanon is one of a pair of Hindu temples built during the reign of Suryavarman II (from 1113–1150) at Angkor, Cambodia. Thommanon was built around the time when work on Angkor Wat was begun.

This small and elegant temple is located east of the Gate of Victory of Angkor Thom and north of Chau Say Tevoda. It is part of the UNESCO World Heritage Site, inscribed by UNESCO in 1992 titled Angkor.

The temple is dedicated to Shiva and Vishnu.