Cost of Living in Oak Brook, IL
Overall index: 201 (100 = US national average). Data source: US Census ACS 2023 & BLS OEWS 2025, 2025.
Overall Cost of Living Index
Cost Breakdown by Category
| Category | Index | vs US avg | Sample cost |
|---|---|---|---|
| Housing | 249 | +149% | $2,045 |
| Transportation | 112 | +12% | $3.50 |
| Food | 229 | +129% | $939 |
| Utilities | 175 | +75% | $448 |
| Healthcare | 175 | +75% | $324 |
Index 100 = US national average. Higher = more expensive.
Cost breakdown (visual)
Salary Calculator: What do you need to earn in Oak Brook?
A single adult living comfortably in Oak Brook, IL needs approximately $70,350 / year after taxes.
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Frequently Asked Questions
What is the cost of living in Oak Brook, IL?
The overall cost of living in Oak Brook, IL is 101% higher than the US national average (index: 201 where 100 = national average).
How much is rent in Oak Brook, IL?
Average rent for a 1-bedroom apartment in Oak Brook, IL is about $2,045/month.
Is Oak Brook, IL expensive to live in?
Yes, Oak Brook, IL is considered expensive (index above national average).
What salary do I need to live in Oak Brook, IL?
A single adult needs roughly $70,350/year to cover basic living costs in Oak Brook, IL.