Khao Chamao - Khao Wong National Park is a protected area located in the Khao Chamao District of Rayong Province, Thailand. The park encompasses approximately 52,300 rai, which is equivalent to about 84 square kilometres or 32 square miles.
The landscape of the national park consists primarily of forested mountains. It is situated south of the larger Khao Ang Rue Nai Wildlife Sanctuary, which lies to its north.