Keyport is an unincorporated community in Kitsap County, Washington, United States. The community is located at the eastern terminus of State Route 308 on the Kitsap Peninsula, 3.42 miles (5.50 km) east of Subase Bangor. Keyport's ZIP Code, 98345, had a ZCTA population of 554 at the 2010 census, in addition to a small contingent of Navy personnel. Keyport's only church, Keyport Bible Church, was established in the early 1900s and incorporated in 1926. The church's building was dedicated May 2nd, 1937 and has since added a number of additional classrooms and a multipurpose building.