There are 7 zip codes in Isabella County, Michigan. The most populated is 48858, located in Mount Pleasant. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
48858Mount Pleasant43,036
48883Shepherd6,692
48893Weidman5,274
49310Blanchard2,952
48859Mount Pleasant2,395
48878Rosebush1,510
48896Winn268

Isabella County, Michigan Zip Codes by Population (2024)