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.

Kitsap County is a county in the U.S. state of Washington. As of the 2020 census, its population was 275,611. Its county seat is Port Orchard; its largest city is Bremerton. The county, formed out of King County and Jefferson County on January 16, 1857, is named for Chief Kitsap of the Suquamish Tribe. Originally named Slaughter County, it was soon renamed.