ZIP Codes of Polk County, WI

Population & People
Population & People
Total Population
45,780
Household Income
Household Income
Median Income
$75,294
Housing
Housing
Total Housing Units
24,597
Business & Economy
Business & Economy
Total Businesses
1,150
Employment
Employment
Employment Rate
59.30%
Education
Education
Bachelor's Degree+
23.99%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 13 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:13 ZIP Codes (13 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:534 / 715
Timezone:Central (GMT -06:00)
Local Time:11:55:40 PM
Population:45,780 [See All]
FIPS:55095
Land Area:939 sq mi
Water Area:40 sq mi
Coordinates:45.4268, -92.4663
Quick Link:
https://www.zip-codes.com/county/wi-polk.asp
Need Polk data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Wisconsin's longest commutes
30-minute average travel time to work.

Standout ZIPs in this County


Most Populous
Amery · 7,906 people
17.3% of county total
Highest Income
Star Prairie · $95,833 median
1.3× county average
Largest Land Area
Frederic · 174.0 sq mi
Spans the most ground
Fastest Growth
Balsam Lake · 29.7% (10-yr)
2,197 → 2,849 residents
Most Educated
Amery · 28.6% bachelor's+
1,789 of 6,252 adults 25+

Things worth knowing about Polk County


45,780 residents live across 13 ZIPs covering 939 sq mi, served by 13 distinct USPS-recognized cities.

Population moved from 44,465 to 45,780 from 2014 to 2024 — a +3.0% change. 8 ZIPs gained residents, 5 lost.

The county's wealthiest ZIP 54026 (Star Prairie, $95,833 median) and poorest ZIP 54858 (Milltown, $53,901) are 19.5 miles apart — a 1.8× income gap across local geography.

Median home values vary 1.7× across this county — from $204,300 in 54006 (Cushing) to $342,200 in 54026 (Star Prairie).

Density varies across the county — from 22 people/sq mi in 54837 (Frederic) to 97 in 54026 (Star Prairie).

Educational attainment ranges from 11.5% bachelor's+ in 54006 (Cushing) to 28.6% in 54001 (Amery) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #32 most populous of 73 counties and ranks #36 for median household income .

Weighted by population, the typical household earns about $76,634 across the county — reflecting what a typical resident sees, not a simple ZIP average.

24.0% of adults age 25+ hold a bachelor's degree or higher (8,102 of 33,774 reporting).

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

Stories about Polk County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
939
square miles
Avg density
48.7
people per sq mi
Population
45,780
across 13 ZIPs
Frederic
174.0 sq mi
3,803 residents
Amery
123.1 sq mi
7,906 residents
Saint Croix Falls
97.9 sq mi
5,035 residents

All ZIP Codes in Polk County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54001AmeryStandard7,906$80,344123.1-3.1%
54020OsceolaStandard7,687$74,70280.87.4%
54024Saint Croix FallsStandard5,035$75,41797.97.8%
54837FredericStandard3,803$71,010174.08.4%
54853LuckStandard3,506$75,00096.8-15.8%
54005Clear LakeStandard3,264$87,81386.912.8%
54810Balsam LakeStandard2,849$69,91757.329.7%
54009DresserStandard2,739$89,86132.914.7%
54026Star PrairieStandard2,361$95,83324.320.2%
54004ClaytonStandard2,192$68,18279.2-14.1%
54824CenturiaStandard1,950$67,14839.6-18.4%
54858MilltownStandard1,636$53,90118.0-4.4%
54006CushingStandard852$69,68828.320.5%

Adjacent & Nearby Counties