Cost of Living in Oak Brook, IL

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F
100%
Overall NAT. AVG.
2%
Groceries NAT. AVG.
329%
Housing NAT. AVG.
Date & Last Updated: These cost of living estimates reflect 2026 modeled data using U.S. Census housing inputs and AI-assisted city-level pricing models.
The cost of living index is based on a national average of 100. For example, if the cost of living score is 90, then the estimated cost of living is 10% lower than the national average. If the score is 110, then the estimated cost of living is 10% higher than average. The overall index is calculated using weighted estimates across major everyday expense categories, including housing (30%), groceries (16%), transportation (12%), healthcare (10%), utilities (8%), lifestyle and entertainment (8%), household expenses (8%), and education and childcare (8%). All values are AI-assisted city-level estimates designed for directional comparisons.
Index Oak Brook Illinois National
Cost of living20098100
Groceries102100100
Health care99100100
Housing42995100
Transportation104101100
Utilities10199100
Lifestyle & Entertainment102100100
Household Items101100100
Education & Childcare101100100
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Homes For Sale In Oak Brook, IL

property for sale

3112 Cara Ln

Oak Brook, IL
property for sale

1S476 Renaissance BLVD

Oak Brook, IL
property for sale

19W107 Avenue Normandy N

Oak Brook, IL
property for sale

20 N Tower Rd Unit 9C

Oak Brook, IL

Cost Of Living Quick Facts

  • The cost of living in Oak Brook is 103% higher than the Illinois average
  • The cost of living in Oak Brook is 100% higher than the national average
  • Oak Brook housing is 329% higher than the national average
  • Illinois general sales tax is 22% higher than the national average
  • Illinois state income tax is 91% higher than the national average

Most Affordable Places to Live in and Around Oak Brook

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Compare Oak Brook, IL Cost of Living

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      Salary Calculator

      This is how much you would need to earn in
      Price difference in compared to
      Cost of living index
      Groceries index
      Health care index
      Housing index
      Transportation index
      Utilities index
      Lifestyle index
      Household index
      Educare index

      Median Income & Debt-To-Income Ratio

      Median Income Per Year Per Month Max Budget (28% DTI) Max Budget (36% DTI)
      Owners$213,187$17,766$4,974$6,396
      Renters$145,110$12,093$3,386$4,354
      The percentage of monthly income spent on housing related expenses can help predict the affordability of housing in Oak Brook, IL, as well as what the overall cost of living might be. Generally, a good rule to follow is that the debt-to-income (DTI) level you want to maintain is 28 percent or less of your income on your rent or mortgage payments and not more than 36 percent of income on all expenses and debts. In Oak Brook, homeowners have a median income of $213,187. Using that number, a maximum of $4,974 per month should be allocated to housing expenses. For those who are renting instead of owning, the median income is $145,110, which means there is a maximum of $3,386 to be spent on the costs of renting a home or apartment.

      Illinois Sales Tax

      State General Sales Tax With Max Surtax
      Illinois 6.25% 10.25%

      Illinois Income Tax

      State Income Tax (Low) Income Tax (High)
      Illinois 4.95% 4.95%

      Nearby cities with low cost of living

      City Population Cost of Living Index National Avg.
      Hodgkins, IL1,8178316.9%
      Dixmoor, IL3,6638712.6%
      Hometown, IL4,3508911.2%
      Robbins, IL5,2418910.5%
      Blue Island, IL23,702936.9%
      Oak Brook, IL8,37720099.7%

      Cities with similar population

      City Population Cost of Living Index National Avg.
      Hillsdale, MI8,3768514.8%
      Summit Park, UT8,37417676.4%
      St. Martin, MS8,380909.8%
      Banff, AB8,380n/a 
      London, KY8,3718811.6%
      Oak Brook, IL8,37720099.7%
      Date & Last Updated: These cost of living estimates reflect 2026 modeled data using U.S. Census housing inputs and AI-assisted city-level pricing models.
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