ZIP Code 53505

53505 is one of Wisconsin's ZIP codes, delivering to addresses in Avalon, Rock County.

City: Avalon
County: Rock County
State: Wisconsin
Prefix: 535xx

Where this code sits

53505 is part of the 535xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Avalon.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 53505 delivers to without sharing its boundary.

ZIP codes nearest 53505

The ZIP codes whose reference points sit closest to 53505.
ZIP code	Distance	Delivers to
ZIP code 53114	5.9 mi	Darien, WI
ZIP code 53525	7.6 mi	Clinton, WI
ZIP code 53546	8.8 mi	Janesville, WI
ZIP code 53563	10 mi	Milton, WI
ZIP code 53115	11 mi	Delavan, WI
ZIP code 53585	11 mi	Sharon, WI
ZIP code 53547	11 mi	Janesville, WI
ZIP code 53545	12 mi	Janesville, 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 53505, plotted from its record coordinates.

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

Scope ZIP code 53505. 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.