Wat Chetawan is a Thai temple in Petaling District, Selangor, Malaysia. The temple is situated at Jalan Pantai, off Jalan Gasing in Petaling Jaya. It was built in 1957 and officiated by the late King Bhumibol Adulyadej, the King of Thailand at the time. The temple is also the only Malaysian Siamese temple which has been chosen as the custodian of the Buddha sacred relics for all Malaysian Buddhists that are parts of the ancient relics discovered in Piprahwa, a village in Uttar Pradesh near the border of the Kingdom of Nepal in 1898 which were presented to King Chulalongkorn of Siam by the then British Viceroy of India, Lord Curzon.

Selangor, also known by the Arabic honorific Darul Ehsan, or "Abode of Sincerity", is one of the 13 states of Malaysia. It is on the west coast of Peninsular Malaysia and is bordered by Perak to the north, Pahang to the east, Negeri Sembilan to the south, and the Strait of Malacca to the west. Selangor surrounds the federal territories of Kuala Lumpur and Putrajaya, both of which were previously part of it. Selangor has diverse tropical rainforests and an equatorial climate. The state's mountain ranges belong to the Titiwangsa Mountains, which is part of the Tenasserim Hills that covers southern Myanmar, southern Thailand and Peninsular Malaysia, with Mount Semangkok as the highest point in the state.