ZIP codes in Sauk County
20 ZIPs touch Sauk County, Wisconsin. The blue dashed line is the county border; orange ZIPs reach into it.
20
ZIP codes
12
cross the county line
83,444
people in these ZIPs
72
counties in WI
Most people
Sauk County ZIP list
More counties in Wisconsin
- Portage County23
- Price County14
- Racine County20
- Richland County15
- Rock County23
- Rusk County14
- Sawyer County12
- Shawano County27
- Sheboygan County20
- St. Croix County18
- Taylor County16
- Trempealeau County14
Questions people actually ask
How many ZIP codes are in Sauk County, Wisconsin?
20 ZIP codes reach into Sauk County, including 1 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 Sauk County has the most people?
53913 (Baraboo) has about 21,704 residents, the most of any ZIP touching Sauk County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Sauk 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 Sauk 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