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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Oak Brook, IL

Oak Brook, IL Covers 3 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 60521StandardDupage17,597630 / 708 / 331 / 847 / 224 / 773
ZIP Code 60522P.O. BoxDupage0630 / 708 / 847 / 312 / 773 / 224
ZIP Code 60523StandardDupage9,890630 / 708 / 331 / 847 / 224 / 773

Timezone(s):Central (GMT -06:00)
Counties:DUPAGE, IL
Population:7,883 (More Details)
Male Population:3,778
Female Population:4,105
Median Age:55
ZIP Codes:3
Area Codes:7
Total Area:336 square miles (county)
Land Area:328 square miles (county)
Water Area:9 square miles (county)

Oak Brook, IL Demographic Information *

Total population7,883
Male population3,778
Female population4,105
Median age (years)54.5
White Population5,661
Black Population155
Indian Population5
Asian Population1,832
Hawaiian Population0
Hispanic Population339
Median age (Male)53.5
Median age (Female)55.4
Total households2,939
Family households (families)2,363
Average household size2.63
Average family size2.99
Total housing units3,188
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],