M-4, was formerly the designation of two different routes in the US state of Michigan.
- M-4 (1936–1939 Michigan highway) was the original designation of M-134 in Mackinac and Chippewa counties.
- M-4 (1979–1986 Michigan highway) was the original designation of M-10 (Northwestern Highway) from I-696/US 24 to the northern terminus.
This article includes a list of roads, streets, highways, or other routes that are associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.
| Browse numbered routes | ||||
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←  M-3 | MI | →  M-5 | ||