Unity Pond (Lake Winnecook) is the largest lake in Waldo County, Maine. It is within the towns of Unity, Burnham, and Troy. The main tributaries are Meadow Brook, Bithers Brook, and Carlton Stream. The sole outflow is Twenty-Five Mile Stream, via a wetlands to the southwest of the pond, which in turn feeds into the Sebasticook River. The pond is surrounded by almost 300 residences, of which slightly more than half are seasonal. It is also used for boating, fishing, camping, and swimming.