ZIP codes in McLean County

18 ZIPs touch McLean County, North Dakota. The blue dashed line is the county border; orange ZIPs reach into it.

ZIP codes

cross the county line

13,203

people in these ZIPs

counties in ND

Most people

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McLean County ZIP list

More counties in North Dakota

All 53 counties in North Dakota

Questions people actually ask

How many ZIP codes are in McLean County, North Dakota?

18 ZIP codes reach into McLean County. 11 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in McLean County has the most people?

58540 (Garrison) has about 2,634 residents, the most of any ZIP touching McLean County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in McLean 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 McLean 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