M-56 was the designation given to two former state trunkline highways in the U.S. state of Michigan:
- M-56 (1919–1957 Michigan highway) from Monroe to Flat Rock
- M-56 (1971–1987 Michigan highway) in Flint
| Browse numbered routes | ||||
|---|---|---|---|---|
←  M-55 | M-56 | →  M-57 | ||
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