ZIP codes in Buena Vista County

14 ZIPs touch Buena Vista County, Iowa. The blue dashed line is the county border; orange ZIPs reach into it.

ZIP codes

cross the county line

25,773

people in these ZIPs

counties in IA

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Buena Vista County ZIP list

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Questions people actually ask

How many ZIP codes are in Buena Vista County, Iowa?

14 ZIP codes reach into Buena Vista County. 12 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Buena Vista County has the most people?

50588 (Storm Lake) has about 13,431 residents, the most of any ZIP touching Buena Vista County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Buena Vista 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 Buena Vista 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