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Zip Code 54858 — Milltown, WI

54858 is a ZIP Code associated with Milltown, WI, located within Polk. The postal region supports an estimated population of 1,636 residents across Data Pending housing units, with a population density of 35.9 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (45.518240, -92.460310)

Data Metric	Local Statistic
Postal / Zip Code	54858
Primary City	Milltown
State / Province	WI
County	Polk
Total Population	1,636
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	35.9 people/sq mi
Timezone	America/Chicago

How 54858 Compares

Metric	ZIP 54858	Polk County	WI State Average
Population	1,636	47,347	5,914,913
Median Income	Data Pending	N/A	N/A
Population Density	35.9 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 54853	Luck	3.7 mi	3,506	N/A
Zip 54824	Centuria	4.9 mi	1,950	N/A
Zip 54810	Balsam Lake	5.4 mi	2,849	N/A
Zip 54024	Saint Croix Falls	9.2 mi	5,035	N/A
Zip 54006	Cushing	10.3 mi	852	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →