 Bainbridge Island is located within the Puget Sound Basin, east of the Kitsap Peninsula, directly east of the Manette Peninsula and west of the city of Seattle.The island is approximately wide and long, encompassing nearly , and is one of the larger islands in Puget Sound.Bainbridge Island shorelines border the main body of Puget Sound, as well as Port Orchard Bay, a large protected embayment, and two high-current tidal passages, Rich Passage and Agate Pass.