Oak Brook, Illinois

Oak Brook population, 2020 to 2024

Oak Brook added 40 residents from July 2020 to July 2024, a change of +0.5%. In the latest year it moved by +84. Among 330 Illinois places of 5,000 or more, that growth ranks 86th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Oak Brook is 55% of it.

Oak Brook covers 7.98 square miles of land and 0.32 of water, for 1,026 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Oak Brook is less dense than the typical town.

The 2 counties Oak Brook spans

Oak Brook crosses county lines. The Census county-part estimates split its 8,188 residents as follows; DuPage County holds 99.9% of them. The shaded shapes are on the map above; dots mark the eight nearest places.

ZIP codes in Oak Brook

1 ZIP Code Tabulation Area (ZCTA) overlaps Oak Brook by at least 10% of the ZCTA's or the village's land: 60523. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Oak Brook is

The Census internal point of Oak Brook is at 41.836400, -87.953200. Springfield, the capital, is 167.4 miles SSW in a straight line. The nearest larger place is Clarendon Hills, IL (8,703 people), 2.6 miles away. The nearest city of 100,000 or more is Naperville, IL, 12.3 miles away.

Daylight in Oak Brook

At 41.84° N, Oak Brook gets about 15 h 13 min of daylight around the June solstice and 9 h 08 min around the December solstice, a swing of 6 h 05 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Oak Brook

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Oakbrook Terrace, 1.4 miles away, with 2,729 people.