The Swan Creek Watershed (SCW) is a sub-watershed of the Saginaw Bay Watershed in Michigan's Eastern Lower Peninsula. The watershed has a geographic area of 9.5 square miles in the Saginaw Urbanized Area. The watershed drains approximately 140 square miles. Portions of two townships in Saginaw County, James and Thomas Townships, lie in the urbanized area of the Swan Creek. The Swan Creek flows into the Shiawassee River, which meets the Flint, Cass, and Tittabawassee Rivers to form the beginning of the Saginaw River.