- Bremerton is a city in Kitsap County, Washington. 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. Bremerton is connected to downtown Seattle by two ferries: a 60-minute ferry that carries both vehicles and walk-on passengers, and a 28-minute Fast Ferry that carries passengers and a limited number of bicycles.