Cost of Living in Oak Brook, IL
Population 8,028 · Illinois · Data vintage 2023
(100 = US avg)
Oak Brook's housing market reflects its status as a high-earning metro: $868,000 for a typical home, 185% above the US median, paired with household incomes around $171,123 that put it in the upper third of the state. At 9.7%, the local unemployment rate runs well above the US figure, pointing to structural rather than cyclical labor-market issues.
Geographically, Oak Brook sits roughly 12 miles northeast of Naperville. Median home values run roughly 70% higher than Naperville's $510,000.
Cost Overview
Scale: 100 = US national average. Green < 90, Red > 110.
About the Cost of Living in Oak Brook
The median home value in Oak Brook is $867,900 — 185% above the national median of $305,000. Median rent runs $2,921/month, 122% higher than the national median of $1,314/month. The median household income of $171,123/year is 129% higher than the US median of $74,580. The local unemployment rate is 9.7%, above the national average of 4.8%. Illinois's top state income tax rate is 5.0% and the combined sales tax is 8.7%. Overall, Oak Brook has a cost of living index of 260 versus the US average of 100, meaning it is 160% more expensive.
Oak Brook has limited residential data
Detailed housing and income data is limited for this location. Here are the nearest cities with full cost of living data:
🏠 Housing
HUD Fair Market Rents by Bedroom
💰 Estimated Monthly Budget
Estimates based on median data and national averages. Actual costs vary.
🛒 Food & Groceries
National BLS average prices (2023). Local prices may vary.
🚗 Transportation
Commute Mode
⚡ Utilities
📋 Taxes
💼 Income & Employment
🎓 Education
👥 Demographics
💨 Air Quality
EPA AQS 2023 — county-level monitoring data
Frequently Asked Questions
What is the cost of living in Oak Brook, IL?
Oak Brook has a cost index of 260 (100 = national average). It is 160% above the national average.
What is average rent in Oak Brook, IL?
The median gross rent in Oak Brook is $2,921 per month based on 2023 Census data.
What is the average home price in Oak Brook?
The median home value in Oak Brook is $867,900 according to Zillow and Census data.
What is the median income in Oak Brook?
The median household income in Oak Brook is $171,123 per year (2023 ACS 5-year estimates).
What is the sales tax in Oak Brook, IL?
The combined state and local sales tax rate in Oak Brook is 8.7%. The Illinois state income tax top rate is 5.0%.
Is Oak Brook, IL affordable?
Oak Brook is above average in cost of living, with an index of 260 — about 160% higher than the national average.
Oak Brook at a Glance
- Population
- 8,028
- Median Income
- $171,123
- Home Value
- $867,900
- Median Rent
- $2,921/mo
- Unemployment
- 9.7%
- Sales Tax
- 8.7%
Nearby Cities
Explore county-level cost of living data
Illinois Rankings
Similar Cost Cities
Cities in other states with comparable housing costs