Oak Brook village, Illinois Demographics & Population 2026

Population Overview

Oak Brook village is a small city located in Illinois. The total population is 8,028. It ranks as the 263rd most populous out of 1,445 cities and towns in Illinois.

Age Demographics

The median age in Oak Brook village is 51.7 years. This is 33% higher than the state median of 38.9 years. 16.1% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Oak Brook village is $171,123. This is 109% higher than the state median of $81,702. Compared to the national median of $78,538, household income here is 118% higher. The poverty rate stands at 7.3%. This is 38% lower than the state poverty rate of 11.7%. The unemployment rate is 9.7%. This is 67% higher than the state rate of 5.8%. The median home value is $867,900. Housing costs are 246% higher than the state median of $250,500. The home-value-to-income ratio is 5.1x. 93.7% of occupied housing units are owner-occupied. This homeownership rate is 40% higher than the state average of 66.8%.

Race & Ethnicity

The largest racial or ethnic group in Oak Brook village is White (non-Hispanic), making up 60.3% of the population. Asian residents account for 29.8%. The Black or African American population (1.1%) is well below the state average of 13.6%. The Hispanic or Latino population (6.5%) is well below the state average of 18.5%. The Asian population is significantly higher than the state average (29.8% vs 5.8%).

Education

67.1% of residents aged 25 and older hold a bachelor's degree or higher. This places Oak Brook village in the top 10% of all cities in the state for educational attainment. This is 80% higher than the state rate of 37.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.9%. Notably, 34.8% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Oak Brook village, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. For official data, visit data.census.gov.