The Quinebaug River is a river in south-central Massachusetts and eastern Connecticut, with watershed extending into western Rhode Island. The name "Quinebaug" comes from the southern New England Native American term, spelled variously Qunnubbâgge, Quinibauge, etc., meaning "long pond", from qunni-, "long", and -paug, "pond". The river is one of the namesake rivers in the Quinebaug and Shetucket Rivers Valley National Heritage Corridor.