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ZIP codes in Ingham County

39 ZIPs touch Ingham County, Michigan. The blue dashed line is the county border; orange ZIPs reach into it.

39

ZIP codes

13

cross the county line

362,789

people in these ZIPs

83

counties in MI

Most people

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Ingham County ZIP list

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Questions people actually ask

How many ZIP codes are in Ingham County, Michigan?

39 ZIP codes reach into Ingham County, including 16 PO Box or single-address ZIPs placed by the town they serve. 13 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Ingham County has the most people?

48823 (East Lansing) has about 50,034 residents, the most of any ZIP touching Ingham County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Ingham County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Ingham County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from