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ZIP codes in Pottawattamie County

26 ZIPs touch Pottawattamie County, Iowa. The blue dashed line is the county border; orange ZIPs reach into it.

26

ZIP codes

12

cross the county line

110,173

people in these ZIPs

99

counties in IA

Most people

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Pottawattamie County ZIP list

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Questions people actually ask

How many ZIP codes are in Pottawattamie County, Iowa?

26 ZIP codes reach into Pottawattamie County, including 2 PO Box or single-address ZIPs placed by the town they serve. 12 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Pottawattamie County has the most people?

51503 (Council Bluffs) has about 37,972 residents, the most of any ZIP touching Pottawattamie County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Pottawattamie 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 Pottawattamie 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