Coulee Dam is a town in Washington, United States. It is part of the 'Wenatchee, Washington Metropolitan Statistical Area'. Coulee Dam's population was 1,044 at the 2000 census. Coulee Dam is partially in Okanogan and Douglas Counties, with one resident living in Grant County. Data released by the Office of Financial Management for 2005 estimates that the Grant County portion of Coulee Dam is now unpopulated. Coulee Dam apartments for rent comparison page shows most up to date rent information on Coulee Dam apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.