ZIP Code 54521

54521 is one of Wisconsin's ZIP codes, delivering to addresses in Eagle River, Vilas County.

City: Eagle River
County: Vilas County
State: Wisconsin
Prefix: 545xx

Where this code sits

54521 is part of the 545xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Eagle River.

Eagle River Wisconsin ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 54521 delivers to without sharing its boundary.

ZIP codes nearest 54521

The ZIP codes whose reference points sit closest to 54521.
ZIP code	Distance	Delivers to
ZIP code 54519	8.9 mi	Conover, WI
ZIP code 54562	9.6 mi	Three Lakes, WI
ZIP code 54558	11 mi	Saint Germain, WI
ZIP code 54554	13 mi	Phelps, WI
ZIP code 54560	14 mi	Sayner, WI
ZIP code 54561	15 mi	Star Lake, WI
ZIP code 54501	16 mi	Rhinelander, WI
ZIP code 54540	17 mi	Land O Lakes, 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 54521, plotted from its record coordinates.

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

Scope ZIP code 54521. 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.