Grand Lake Stream is a plantation in Washington County, Maine, United States. The population was 125 at the 2020 census. Grand Lake Stream, the town is named after the stream that flows through the town, which is notable for its excellent landlocked salmon fishery and a fishing tradition that dates to the middle of the 19th century. It also has a long, local tradition of hand-built wooden canoes, ideal for navigating the waters of nearby West Grand Lake.