Wang Chau () is an island of Hong Kong. Administratively, it is part of Sai Kung District.
Together with Basalt Island and Bluff Island, it forms the Ung Kong Group () and is part of Hong Kong Global Geopark.
The Ung Kong Group Special Area () covers 176.8 hectares and was designated in 2011. It consists of Basalt Island, Bluff Island, Wang Chau, their surrounding islets, and Kam Chung Ngam () in the southern part of Jin Island. The geology of the area is characterised by volcanic rocks of the Cretaceous periods.