Portage River may refer to the following streams in the U.S. state of Michigan:
- Portage River (Houghton County, Michigan), the southern end of the Keweenaw Waterway
- Portage River (Washtenaw County, Michigan), a tributary of the Huron River
- Portage River (Jackson County, Michigan), a tributary of the Grand River
- Portage River (Kalamazoo/St. Joseph Counties), a tributary of the St. Joseph River (Lake Michigan)
Index of articles associated with the same name
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