Statistic Oak Brook Illinois National
Population 8,377 13,081,969 336,919,644
Population density (sq mi) 1,052 236 91
Median age 55.1 37.4 37.7
Male/Female ratio 0.9:1 1.0:1 1.0:1
Married (15yrs & older) 76% 55% 55%
Families w/ Kids under 18 33% 44% 43%
Speak English 62% 77% 79%
Speak Spanish 4% 13% 13%
See Who Lives in the Area Before Buying! Local Insights Report
  • Know the community before you call it home
  • Get clear insights into age, income, education, etc.
  • Access over 300 data points for any address
Local Insights Report

Overview of Oak Brook Demographics

The population in Oak Brook is 8,377, while the population density is 1,052 people per square mile, contrasting with the national average of 91. The median age stands at 55.1, with 76% of individuals aged 15 or older being married and 33% having children under 18. In terms of household income equality in Oak Brook, 11% of households report a median income below $25,000, while 54% report an income exceeding $150,000. The Oak Brook demographics data can provide invaluable insight into the composition, dynamics and needs of urban and rural areas, enabling planners, developers and policymakers to strategize effectively for the promotion of prosperity, equity and well-being for all residents in the area.

Oak Brook Racial Demographics & Ethnicity

Recognizing the racial demographics and ethnicity breakdown of Oak Brook is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In Oak Brook, the racial breakdown comprises 63.9% White, 1.8% Black or African American, 29.6% Asian, 0% American Indian, and 0% Native Hawaiian, with 4.7% of the population identifying as Hispanic or Latino. 62.2% of households reported speaking English only, while 4.2% reported speaking Spanish only. Furthermore, 26.7% of residents were categorized as foreign-born.

Oak Brook Population Density

Oak Brook, characterized by above-average population density, plays a pivotal role in promoting environmental sustainability by reducing per capita energy consumption, greenhouse gas emissions and land use. Its compact urban development encourages energy-efficient buildings, active transportation modes like walking and cycling and the utilization of public transit, fostering sustainable lifestyles and mitigating environmental impact. Additionally, the area's dense population contributes to a vibrant social and cultural scene, featuring a diverse array of cultural events, festivals and community activities. This cultural diversity fuels creativity, innovation, and cross-cultural exchange, enhancing the community's social fabric. The Oak Brook population density stands at 1,052, exceeding the national average, at 91 people per square mile, positioning it in a nice position to reap the benefits of densely populated areas.

Why are Demographics Important?

Urban Development: Urban planners can leverage demographics data in Oak Brook to design and develop areas that cater to residents' needs, spanning housing, transportation, and public services, while prioritizing sustainability and enhancing quality of life. Demographic changes can contribute to gentrification and neighborhood evolution, whether in urban or rural contexts. As neighborhoods attract new residents with diverse income levels and lifestyle preferences, property values may appreciate, potentially displacing longstanding residents and reshaping the neighborhood's identity. Understanding population density, age distribution, household size and income levels is essential for guiding decisions on zoning, transportation infrastructure, housing development and public amenities. Incorporating Oak Brook demographics data into planning and implementing affordable housing initiatives can help mitigate displacement risks.

Policy Planning: At various levels of government and within organizations and businesses, demographic data and statistics serve as essential tools for guiding policy and decision-making processes. Through the examination and interpretation of Oak Brook demographic stats and data, policymakers, government officials, and organizational leaders can pinpoint areas requiring attention, allocate resources judiciously and design policies and initiatives tailored to the specific needs and preferences of distinct demographic segments. The utilization of Oak Brook demographic data plays a pivotal role in policy formulation by informing resource allocation, facilitating evidence-based decision-making, identifying key priorities, predicting future trends, assessing policy effectiveness, and advancing principles of equity and inclusivity. Through effective utilization of this data, policymakers can craft policies that are targeted, efficient, and responsive to the diverse needs of communities.

Education Allocation: Education planning benefits significantly from Oak Brook demographic information, which helps identify student demographics, school enrollment trends, and educational needs. This data assists schools and policymakers in allocating resources effectively and devising impactful educational programs. It serves as a vital tool for recognizing disparities in educational access and outcomes among diverse demographic groups, including racial and ethnic minorities, socio-economic status, and students with disabilities. By disaggregating data based on demographic factors, education planners can pinpoint areas of inequity and implement targeted interventions to improve access, support, and outcomes for marginalized students. Ultimately, Oak Brook demographic data is essential in education for advancing equity, fostering student success, and cultivating inclusive learning environments tailored to meet the needs of all students.

Demographics Quick Facts

  • The population density in Oak Brook is 346% higher than Illinois
  • The median age in Oak Brook is 47% higher than Illinois
  • In Oak Brook 63.93% of the population is White
  • In Oak Brook 1.81% of the population is Black
  • In Oak Brook 29.62% of the population is Asian

Compare Oak Brook, IL Demographics

City Image
    City Default Image
      vs
      Compare Neighborhoods & Addresses Local Insights Report

      Why stop at city-to-city? With Local Insights, you can compare neighborhoods, zip codes, or even exact addresses. Access 300+ hyperlocal data points—from schools and crime to housing and amenities—to see which area is the better fit.

      Local Insights Report

      Oak Brook racial demographics

      Race Oak Brook Illinois National
      White 63.93% 72.14% 73.35%
      Black 1.81% 14.30% 12.63%
      Asian 29.62% 5.10% 5.22%
      American Indian 0.00% 0.23% 0.82%
      Native Hawaiian 0.00% 0.03% 0.18%
      Mixed race 4.06% 2.34% 3.06%
      Other race 0.58% 5.86% 4.75%
      In Oak Brook, 4.7% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Oak Brook age breakdown

      Marital status

      Age of children in married couples

      Source: The Oak Brook, IL demographics data displayed above is derived from the United States Census Bureau American Community Survey (ACS) and include 2026 modeled data developed using proprietary methodologies.