Marathon County ZIP Codes
Wisconsin, United States · 19 codes
Marathon County in Wisconsin has 19 ZIP codes, from 54401 to 54488, serving 19 places.
ZIP codes in Marathon
Frequently asked questions
What is the ZIP code of Marathon?
Marathon has 19 ZIP codes, from 54401 to 54488. The table lists the places each one serves.
How many places are listed in Marathon County?
19 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.