Waukesha County, Wisconsin ZIP Codes

26 ZIP Codes

Zip Code
City
Population
53051Menomonee Falls39,559
53066Oconomowoc37,558
53188Waukesha34,892
53186Waukesha33,374
53151New Berlin32,824
53189Waukesha26,855
53150Muskego26,259
53072Pewaukee26,200
53045Brookfield23,329
53029Hartland21,778
53005Brookfield21,675
53089Sussex20,588
53149Mukwonago19,614
53018Delafield8,201
53118Dousman7,554
53146New Berlin7,285
53122Elm Grove6,508
53119Eagle5,803
53103Big Bend3,762
53058Nashotah3,405
53183Wales3,111
53153North Prairie2,548
53007Butler1,859
53046Lannon1,482
53069Okauchee671
53127Genesee Depot79

Overview of ZIP Codes in Waukesha County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
26
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 26 ZCTAs in Waukesha County, Wisconsin (US Census).