ZIP Code 60523

60523 is one of Illinois's ZIP codes, delivering to addresses in Oak Brook, DuPage County.

City: Oak Brook
County: DuPage County
State: Illinois
Prefix: 605xx

Where this code sits

60523 is part of the 605xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Oak Brook.

Oak Brook Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 60523 delivers to without sharing its boundary.

ZIP codes nearest 60523

The ZIP codes whose reference points sit closest to 60523.
ZIP code	Distance	Delivers to
ZIP code 60514	2.8 mi	Clarendon Hills, IL
ZIP code 60181	3.0 mi	Villa Park, IL
ZIP code 60521	3.1 mi	Hinsdale, IL
ZIP code 60515	3.5 mi	Downers Grove, IL
ZIP code 60148	3.6 mi	Lombard, IL
ZIP code 60558	4.0 mi	Western Springs, IL
ZIP code 60126	4.0 mi	Elmhurst, IL
ZIP code 60162	4.0 mi	Hillside, IL

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 60523, plotted from its record coordinates.

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

Scope ZIP code 60523. 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.