ZIP codes in Buffalo County
10 ZIPs touch Buffalo County, Wisconsin. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
5
cross the county line
31,199
people in these ZIPs
72
counties in WI
Most people
Buffalo County ZIP list
More counties in Wisconsin
- Adams County15
- Ashland County11
- Barron County20
- Bayfield County16
- Brown County24
- Burnett County11
- Calumet County15
- Chippewa County15
- Clark County21
- Columbia County21
- Crawford County14
Questions people actually ask
How many ZIP codes are in Buffalo County, Wisconsin?
10 ZIP codes reach into Buffalo County, including 1 PO Box or single-address ZIPs placed by the town they serve. 5 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Buffalo County has the most people?
54755 (Mondovi) has about 7,389 residents, the most of any ZIP touching Buffalo County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Buffalo 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 Buffalo 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