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. As of the 2020 census, Keyport had a population of 576. To its close west, Keyport and Virginia have maritime borders with each other.