Citygate is a commercial complex at the town centre of Tung Chung, Lantau Island, Hong Kong. It comprises a shopping centre called Citygate Outlets, an office tower, and the Novotel Citygate hotel.

Tung Chung, meaning "eastern stream", is an area on the northwestern coast of Lantau Island, Hong Kong. One of the most recent new towns, it was formerly a rural fishing village beside Tung Chung Bay, and along the delta and lower courses of Tung Chung River and Ma Wan Chung in the north-western coast of Lantau Island. The area was once an important defence stronghold against pirates and foreign military during the Ming and the Qing dynasties.