Kitsap County is a county located in the U.S. state of Washington, named after Chief Kitsap of the Suquamish tribe. As of the 2010 census, its population was 251,133. Its county seat is at Port Orchard, and its largest city is Bremerton.
Kitsap County was formed out of King County, Washington, and Jefferson County, Washington on January 16, 1857. Originally named Slaughter County, it was soon renamed.
The United States Navy is the largest employer in the county, with installations at Puget Sound Naval Shipyard, Naval Undersea Warfare Center Keyport, and Naval Base Kitsap (which comprises former NSB Bangor, and NS Bremerton).
Kitsap County is connected to the eastern shore of Puget Sound by Washington State Ferries routes, including the Seattle-Bremerton Ferry, Southworth to West Seattle via Vashon Island, Bainbridge Island to Downtown Seattle, and from Kingston to Edmonds, Washington.