There are 16 zip codes in Marathon County, Wisconsin. The most populated is 54401, located in Wausau. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5440131,292Wausau
5440324,874Wausau
5447619,767Schofield
5445519,168Mosinee
544845,557Stratford
544114,943Athens
544264,285Edgar
544484,225Marathon
544744,209Rothschild
544213,831Colby
544052,843Abbotsford
544402,699Hatley
544711,643Ringle
544081,235Aniwa
544271,117Eland
544176Brokaw

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