Keyport is an unincorporated community and census-designated place (CDP) located in Kitsap County, Washington, United States. Situated at the eastern terminus of State Route 308 on the Kitsap Peninsula, Keyport is known for its small population and charming coastal setting. According to the 2010 census, the Keyport CDP had a total population of 554 residents.

The United States Naval Undersea Museum is a naval museum located at Keyport, Washington. It is one of the 10 Navy museums that are operated by the Naval History & Heritage Command. It sits next to a branch of the Naval Undersea Warfare Center.