In which county is ZIP code 54903 located?

ZIP 54903 is listed under Winnebago, WI.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 54903: Oshkosh, WI

ZIP: 54903

County: Winnebago

Coordinates: 44.06860, -88.64490

ZIP Type: Standard

Time Zone: Central Time (CT)

Explore detailed information for ZIP code 54903 in Oshkosh, WI. We include verified county details for Winnebago plus key geographic references used for mapping and logistics.

Primary City	Oshkosh
ZIP Code	54903
County	Winnebago
State	WI
Latitude / Longitude	44.06860, -88.64490
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 54903 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 54903 is commonly represented around 44.06860, -88.64490. These coordinates help identify the general area within Winnebago, WI.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 54903 for mail delivery and general location reference in Winnebago, WI.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Oshkosh.

Related ZIP Codes (Nearby)

Explore other postal codes near Oshkosh within WI.

Frequently Asked Questions

What is the primary city for ZIP code 54903?

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

In which county is 54903 located?

ZIP code 54903 is situated within Winnebago, WI.

What are the coordinates for 54903?

The approximate center point is 44.06860 (Latitude) and -88.64490 (Longitude).

Is ZIP code 54903 active?

This page lists ZIP 54903 as Listed based on the latest refresh date shown above.

Does ZIP 54903 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