There are 26 zip codes in Waukesha County, Wisconsin. The most populated is 53051, located in Menomonee Falls. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5305138,639Menomonee Falls
5306636,973Oconomowoc
5318834,078Waukesha
5318633,672Waukesha
5315132,507New Berlin
5307226,653Pewaukee
5318926,640Waukesha
5315026,047Muskego
5304523,292Brookfield
5300521,624Brookfield
5302921,325Hartland
5308919,817Sussex
5314919,533Mukwonago
530187,813Delafield
531467,746New Berlin
531187,154Dousman
531226,461Elm Grove
531195,717Eagle
531033,621Big Bend
530583,177Nashotah
531833,081Wales
531532,740North Prairie
530071,906Butler
530461,351Lannon
53069654Okauchee
53127124Genesee Depot
showing: 26 rows

Zip Codes in Waukesha County, Wisconsin by Population (2024)