ZIP Code 54903

54903 is one of Wisconsin's ZIP codes, delivering to addresses in Oshkosh, Winnebago County.

City: Oshkosh
County: Winnebago County
State: Wisconsin
Prefix: 549xx

Where this code sits

54903 is part of the 549xx range, the group of codes handled by one mail processing centre. Oshkosh is served by 5 ZIP codes in total; the full list, with the county each falls in, is on the Oshkosh page.

Oshkosh Wisconsin ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 54903 delivers to without sharing its boundary.

ZIP codes nearest 54903

The ZIP codes whose reference points sit closest to 54903.
ZIP code	Distance	Delivers to
ZIP code 54906	0.0 mi	Oshkosh, WI
ZIP code 54927	2.4 mi	Butte Des Morts, WI
ZIP code 54904	3.2 mi	Oshkosh, WI
ZIP code 54986	5.1 mi	Winneconne, WI
ZIP code 54963	5.8 mi	Omro, WI
ZIP code 54901	6.0 mi	Oshkosh, WI
ZIP code 54985	6.3 mi	Winnebago, WI
ZIP code 54902	7.8 mi	Oshkosh, WI

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 54903, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 54903. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.