Bremerton is a city in Kitsap County, Washington, United States. The population was 43,505 at the 2020 census and an estimated 44,122 in 2021, making it the largest city on the Kitsap Peninsula. Bremerton is home to Puget Sound Naval Shipyard and the Bremerton Annex of Naval Base Kitsap. The city lies west of Seattle and is connected by an automobile ferry operated by Washington State Ferries and a passenger-only ferry.