In which county is ZIP code 54403 located?

ZIP 54403 is listed under Marathon, WI.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 54403: Wausau, WI

ZIP: 54403

County: Marathon

Coordinates: 44.95290, -89.53180

ZIP Type: Standard

Time Zone: Central Time (CT)

Explore detailed information for ZIP code 54403 in Wausau, WI. We include verified county details for Marathon plus key geographic references used for mapping and logistics.

Primary City	Wausau
ZIP Code	54403
County	Marathon
State	WI
Latitude / Longitude	44.95290, -89.53180
ZIP Type	Standard
Time Zone	Central Time (CT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 54403 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 54403 is approximately 44.95290 (latitude) and -89.53180 (longitude). This location sits within Marathon, contributing to regional planning across WI.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 54403 for mail delivery and general location reference in Marathon, WI.

Some addresses near Wausau may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Wausau within WI.

Frequently Asked Questions

What is the primary city for ZIP code 54403?

The primary city for this ZIP code is Wausau, located in WI.

In which county is 54403 located?

ZIP code 54403 is situated within Marathon, WI.

What are the coordinates for 54403?

The approximate center point is 44.95290 (Latitude) and -89.53180 (Longitude).

Is ZIP code 54403 active?

This page lists ZIP 54403 as Listed based on the latest refresh date shown above.

Does ZIP 54403 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08