Zip Code 54403 — Wausau, WI

ZIP Code 54403 is associated with Wausau, WI, in Marathon County. The listed population estimate is 24,950; estimated density is 72.1 people per square mile. Among records with population estimates, it ranks #2 of 16 in Marathon County and #77 of 780 in WI.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.031420, -89.513430)

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

How 54403 Compares

MetricZIP 54403Marathon County recordsWI records
Population estimate24,950131,688 (sum)5,914,913 (sum)
Population Density72.1 /sq mi----
County population rank#2 of 16----
State population rank#77 of 780----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in WI

ZIP CodeCityDistancePopulation estimate
ZIP 54417Brokaw6.9 mi4
ZIP 54471Ringle8.2 mi1,636
ZIP 54476Schofield9.9 mi19,377
ZIP 54408Aniwa10.0 mi1,247
ZIP 54401Wausau10.5 mi31,692

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 →