Port Gamble is an unincorporated community on the northwestern shore of the Kitsap Peninsula in Kitsap County, Washington, United States. It is also a small, eponymous bay, along which the community lies, near the entrance to Hood Canal. The unincorporated communities of Port Gamble and Little Boston, part of Kitsap County, lie on the west and the east side, respectively, of the mouth of this bay. The Port Gamble Historic District, a U.S. National Historic Landmark, covers one of the nation's best-preserved western lumber towns.

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.