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Zip Code 53548 — Janesville, WI

53548 is a ZIP Code associated with Janesville, WI, located within Rock. The postal region supports an estimated population of 19,916 residents across Data Pending housing units, with a population density of 102.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.689070, -89.130950)

Data MetricLocal Statistic
Postal / Zip Code53548
Primary CityJanesville
State / ProvinceWI
CountyRock
Total Population19,916
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density102.6 people/sq mi
TimezoneAmerica/Chicago

How 53548 Compares

MetricZIP 53548Rock CountyWI State Average
Population19,916170,4145,914,913
Median IncomeData PendingN/AN/A
Population Density102.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 53537Footville4.2 mi752N/A
Zip 53545Janesville5.6 mi24,703N/A
Zip 53501Afton6.6 mi165N/A
Zip 53576Orfordville7.1 mi2,131N/A
Zip 53536Evansville8.7 mi9,547N/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 →