Lion Island is an island that is located at the mouth to the Hawkesbury River in Broken Bay on the Central Coast of the state of New South Wales, Australia. The island is located just off Pearl Beach and is part of the Central Coast Council local government area.
The island is a descriptive name because it resembles a Sphinx, a mythical figure of a crouching lion. Lion Island is part of the Brisbane Water National Park, as it being one of the two islands located within the national park along with Spectacle Island in the Hawkesbury River.