ZIP code · Oak Brook · Illinois · United States

ZIP code 60523 — Oak Brook

ZIP code 60523 serves Oak Brook, Illinois.

Postal code
60523
Single source Value from one source, not cross-checked.
City
Oak Brook
County
DuPage FIPS 17043
State
Illinois
Country
United States
Coordinates
41.8371, -87.9638 — precision precise (locality)
View on OpenStreetMap
Population
10,012 (ZCTA, ACS 5-year)
Population density
1,118 / sq mi
Land area
9 sq mi (23.2 km²) (ZCTA, ACS 5-year)
Median household income
$114,418
Per-capita income
$88,172
Median age
54.7
Households
4,203
Housing units
4,601
Median home value
$733,300
Median gross rent
$776 / month
Congressional districts
IL-4 (also IL-6) (119th Congress)
USDA hardiness zone
6a (-10 to -5 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area codes
630, 708, 847, 312, 331 (from the nearest rate centre)
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Jan (avg low 15°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F323547597181848376634837
Avg low °F151826364758626052403021
Precip in2.22.02.43.84.84.44.34.33.43.62.82.3

NOAA 1991–2020 climate normals from the nearest station: LISLE-MORTON ARBORETUM (5.8 mi) · NOAA NCEI

Places in ZIP 60523

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page