Lilliwaup is a small unincorporated community in Mason County, Washington, United States.

The party left Lilliwaup in June 1890, west to the North Fork Skokomish River and Lake Cushman.

From there a number of smaller parties explored in various directions, including one group that made the first recorded ascent of Mount Olympus.

There were reports that movie stars such as Mary Pickford, Charlie Chaplin, and others were interested in buying homes in Lilliwaup, but they never came and the resort company folded.

A stairway provides public access to the round-rock beach, where picnicking, shellfish harvesting, fishing, and beachcombing are popular.