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U.S. ZIP Codes Database 2026

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Marathon County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Marathon County.

County State ZIP Code City Area Codes
Marathon County WI 54401 Wausau 534, 715
Marathon County WI 54402 Wausau 715
Marathon County WI 54403 Wausau 534, 715
Marathon County WI 54408 Aniwa 534, 715
Marathon County WI 54411 Athens 534, 715
Marathon County WI 54417 Brokaw 534, 715
Marathon County WI 54426 Edgar 534, 715
Marathon County WI 54427 Eland 534, 715
Marathon County WI 54429 Elderon 715
Marathon County WI 54432 Galloway 715
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.