ZIP Codes of Saint Croix County, WI

Population & People
Population & People
Total Population
87,490
Household Income
Household Income
Median Income
$99,978
Housing
Housing
Total Housing Units
35,423
Business & Economy
Business & Economy
Total Businesses
2,220
Employment
Employment
Employment Rate
66.81%
Education
Education
Bachelor's Degree+
38.70%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 11 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:11 ZIP Codes (11 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:534 / 715
Timezone:Central (GMT -06:00)
Local Time:11:55:40 PM
Population:87,490 [See All]
FIPS:55109
CBSA:Minneapolis-St. Paul-Bloomington, MN-WI
Land Area:665 sq mi
Water Area:12 sq mi
Coordinates:45.0328, -92.4722
Quick Link:
https://www.zip-codes.com/county/wi-saint-croix.asp
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Among Wisconsin's 5 wealthiest counties
#3 statewide, average median income $99,978.
Among Wisconsin's 5 fastest-growing counties
#3 statewide, up 11.4% from 2014 to 2024.
Among Wisconsin's 5 most-educated counties
38.7% with bachelor's+ (#4 statewide).
Striking education divide
Bachelor's share spans 20.7% to 50.9% — a 30-point gap.

Standout ZIPs in this County


Most Populous
Hudson · 33,398 people
38.2% of county total
Highest Income
Houlton · $131,146 median
1.3× county average
Largest Land Area
New Richmond · 143.4 sq mi
Spans the most ground
Fastest Growth
Houlton · 30.5% (10-yr)
1,678 → 2,190 residents
Most Educated
Houlton · 50.9% bachelor's+
812 of 1,596 adults 25+

Things worth knowing about Saint Croix County


87,490 residents live across 11 ZIPs covering 665 sq mi, served by 11 distinct USPS-recognized cities.

Population moved from 78,514 to 87,490 from 2014 to 2024 — a +11.4% change. 10 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 54082 (Houlton, $131,146 median) and poorest ZIP 54028 (Woodville, $85,341) are 24.1 miles apart — a 1.5× income gap across local geography.

Median home values vary 1.8× across this county — from $269,300 in 54028 (Woodville) to $476,200 in 54082 (Houlton).

Density varies 20× across the county — from 23 people/sq mi in 54007 (Deer Park) to 463 in 54016 (Hudson).

Educational attainment ranges from 20.7% bachelor's+ in 54013 (Glenwood City) to 50.9% in 54082 (Houlton) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #19 most populous of 73 counties and ranks #3 for median household income with the #3 fastest decade growth .

Weighted by population, the typical household earns about $103,389 across the county — reflecting what a typical resident sees, not a simple ZIP average.

38.7% of adults age 25+ hold a bachelor's degree or higher (23,214 of 59,978 reporting).

11 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

All ZIP Codes in Saint Croix County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54016HudsonStandard33,398$113,08572.26.8%
54017New RichmondStandard20,366$98,571143.421.7%
54025SomersetStandard7,612$86,93051.87.1%
54002BaldwinStandard6,872$88,27576.49.2%
54023RobertsStandard4,620$108,46643.816.1%
54015HammondStandard4,086$114,29338.919.6%
54013Glenwood CityStandard3,443$87,500106.33.4%
54028WoodvilleStandard2,574$85,34136.910.3%
54082HoultonStandard2,190$131,14612.330.5%
54007Deer ParkStandard1,175$85,39852.0-15.5%
54027WilsonStandard1,154$100,75031.116.9%

Adjacent & Nearby Counties