Little Boston is a community in Kitsap County, Washington, United States. It is located on the east side of Port Gamble, an inlet or bay of Hood Canal, and is direct across the bay from the unincorporated community of Port Gamble. Little Boston is within the Port Gamble Indian Reservation, which houses the Port Gamble band of the S'Klallam tribe. The reservation receives approximately 20 inches (510 mm) of rain per year due to its location in the Olympic Mountain rain shadow. The reservation lands rise from the beach to gently rolling terrain.