St. Croix County ZIP Codes
St. Croix County is a county of Wisconsin.
- ZIP codes
- 11
- Cities & towns
- 11
- Area codes
- 2
- Land area
- 722 sq mi
Every ZIP code in St. Croix County
| ZIP code | City |
|---|---|
| 54002 | Baldwin |
| 54007 | Deer Park |
| 54013 | Glenwood City |
| 54015 | Hammond |
| 54016 | Hudson |
| 54017 | New Richmond |
| 54023 | Roberts |
| 54025 | Somerset |
| 54027 | Wilson |
| 54028 | Woodville |
| 54082 | Houlton |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the St. Croix County codes above are listed without a column we would have to invent.
Cities and towns in St. Croix County
A further 1 place in St. Croix County appears in the postal source without a page of its own; its codes are in the table above and each one links to its own page.
Area codes covering St. Croix County
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.
Where St. Croix County's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every ZIP code recorded in St. Croix County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.