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Zip Code 54403 — Wausau, WI

54403 is a ZIP Code associated with Wausau, WI, located within Marathon. The postal region supports an estimated population of 24,950 residents across Data Pending housing units, with a population density of 72.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (45.031420, -89.513430)

Data MetricLocal Statistic
Postal / Zip Code54403
Primary CityWausau
State / ProvinceWI
CountyMarathon
Total Population24,950
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density72.1 people/sq mi
TimezoneAmerica/Chicago

How 54403 Compares

MetricZIP 54403Marathon CountyWI State Average
Population24,950131,6885,914,913
Median IncomeData PendingN/AN/A
Population Density72.1 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 54417Brokaw6.9 mi4N/A
Zip 54471Ringle8.2 mi1,636N/A
Zip 54476Schofield9.9 mi19,377N/A
Zip 54408Aniwa10.0 mi1,247N/A
Zip 54401Wausau10.5 mi31,692N/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 →