St. Croix County, WI ZIP codes
There are 11 ZIP codes in St. Croix County, WI, in 11 towns, from 54002 to 54082. The largest are 54016 (Hudson), 54017 (New Richmond) and 54025 (Somerset). 1 more crosses into it from a neighbouring county: 54022.
The county seat is Hudson.
- ZIP codes
- 11
- Partly in it
- 1 more
- Towns
- 11
- County seat
- Hudson
- County FIPS
55109- State
- Wisconsin
- Population
- 96,033
- Median household income
- $103,046
- Land area
- 722 sq mi
- Metro area
- Minneapolis-St. Paul-Bloomington
St. Croix County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in St. Croix County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of St. Croix County.
- 54022 River Falls · mostly in Pierce County
Map of St. Croix County ZIP codes
The ZIP codes of St. Croix County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
St. Croix County in numbers
About 96,033 people live in St. Croix County, in 37,511 households, the 17th most populous of Wisconsin's 72 counties. The median household income is $103,046 a year, 33% above the Wisconsin median of $77,485 (US: $80,734). The median owner-occupied home is valued at $377,700 (42% above the Wisconsin median), and median gross rent is $1,271 a month. The median age is 40.4; 39.5% of adults 25 and over hold a bachelor's degree or higher (33.4% across Wisconsin); the average commute takes 27 minutes.
| Population | 96,033 |
|---|---|
| Households | 37,511 |
| Median age | 40.4 |
| Median household income | $103,046 |
| Median home value | $377,700 |
| Median gross rent | $1,271 |
| Bachelor's degree or higher | 39.5% |
| Mean commute | 27.0 min |
| Population density | 133 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in St. Croix County
| Town | ZIP codes | Population |
|---|---|---|
| Hudson | 1 | 14,959 |
| New Richmond | 1 | 10,539 |
| Baldwin | 1 | 4,342 |
| Somerset | 1 | 3,208 |
| Hammond | 1 | 1,960 |
| Roberts | 1 | 1,858 |
| Woodville | 1 | 1,424 |
| Glenwood City | 1 | 1,260 |
| Houlton | 1 | 240 |
| Deer Park | 1 | 223 |
| Wilson | 1 | 200 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with St. Croix County.
Not sure you are in St. Croix County? What county am I in? answers from your location, near a county line included.
Every ZIP code in St. Croix County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
54002 | Baldwin , WI | Standard | 6,872 | $88,275 | $309,200 |
54007 | Deer Park , WI | Standard | 1,175 | $85,398 | $309,400 |
54013 | Glenwood City , WI | Standard | 3,443 | $87,500 | $307,600 |
54015 | Hammond , WI | Standard | 4,086 | $114,293 | $326,500 |
54016 | Hudson , WI | Standard | 33,398 | $113,085 | $452,000 |
54017 | New Richmond , WI | Standard | 20,366 | $98,571 | $321,700 |
54023 | Roberts , WI | Standard | 4,620 | $108,466 | $385,100 |
54025 | Somerset , WI | Standard | 7,612 | $86,930 | $386,500 |
54027 | Wilson , WI | Standard | 1,154 | $100,750 | $325,900 |
54028 | Woodville , WI | Standard | 2,574 | $85,341 | $269,300 |
54082 | Houlton , WI | Standard | 2,190 | $131,146 | $476,200 |
Cite this page
zipcodes.pro. “St. Croix County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wi/county/st-croix
Underlying data is public domain or openly licensed — sources, vintages and licences.