The word Washtenaw is a variant of the Ojibwe word: "Wash-ten-ong," the Anishinaabemowin (Ojibwe) name for the Grand River in Michigan.

The name "Washtenaw" was originally applied to the first county west of Detroit, and has since been applied to:

Washtenaw County, Michigan Washtenaw Avenue, a road in Ann Arbor, Michigan, Ypsilanti, Michigan, Harper Woods, Michigan, and Chicago, Illinois Washtenaw Community College, a community college in Ann Arbor, Michigan