There are 14 zip codes in Gratiot County, Michigan. The most populated is 48801, located in Alma. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4880113,621Alma
4888010,026St. Louis
488475,599Ithaca
486152,817Breckenridge
488712,232Perrinton
488771,967Riverdale
488061,794Ashley
488891,482Sumner
486621,293Wheeler
488321,276Elwell
48856879Middleton
48807787Bannister
48874185Pompeii
4886225North Star
showing: 14 rows

Zip Codes in Gratiot County, Michigan by Population (2024)