Cost of Living in Oak Brook, IL

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F
103%
Overall NAT. AVG.
10%
Goods & Services NAT. AVG.
329%
Housing NAT. AVG.
Date & Last Updated: This data reflects 2025 and was released from C2ER in January, 2026; this is the most current data available.
The cost of living index is based on a national average of 100. For example, if the cost of living is 90, then it is 10% lower than average. If the cost of living is 110, then it is 10% higher than average. The breakdown for each index is as follows: goods & services (33%), groceries (13%), health care (5%), housing (30%), transportation (9%) and utilities (10%). If the cost of living data was unavailable for this city, estimates based upon nearby cities were used.
Index Oak Brook Illinois National
Cost of living20398100
Goods & Services11098100
Groceries104100100
Health care116102100
Housing42995100
Transportation104102100
Utilities9598100
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Homes For Sale In Oak Brook, IL

property for sale

2 Oak Brook Club Dr Unit C303

Oak Brook, IL
property for sale

1916 Midwest Club Pkwy

Oak Brook, IL
property for sale

20 N Tower Rd Unit 10A

Oak Brook, IL
property for sale

2715 35th St

Oak Brook, IL

Cost Of Living Quick Facts

  • The cost of living in Oak Brook is 108% higher than the Illinois average
  • The cost of living in Oak Brook is 103% 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
      Goods & Services index
      Groceries index
      Health care index
      Housing index
      Transportation index
      Utilities 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%

      Goods & Services

      Item Oak Brook National avg. Difference
      Haircut $49.08$27.6277.7%
      Beauty Salon $68.42$51.1133.9%
      Toothpaste $4.13$4.090.9%
      Shampoo $1.56$1.541.2%
      Movie $17.42$12.8835.3%
      Yoga $28.87$19.6646.8%

      Groceries

      Item Oak Brook National avg. Difference
      Ground Beef $7.53$7.702.3%
      Fried Chicken $1.56$1.666.2%
      Milk $4.88$4.733.1%
      Potatoes $5.20$5.261.1%
      Pizza $13.97$12.769.5%
      Beer $10.56$10.550.1%

      Health Care

      Item Oak Brook National avg. Difference
      Optometrist $208.97$140.0649.2%
      Doctor $194.67$153.8226.6%
      Dentist $135.44$123.1510.0%
      Ibuprofen $12.22$11.734.2%
      Lipitor $24.14$23.612.2%

      Housing

      Item Oak Brook National avg. Difference
      Home Price $1,400,607.00$326,622.00328.8%
      Avg. Mortgage Payment $2,929.74$2,480.2518.1%
      Apartment Rent $0.00$1,444.00100.0%

      Transportation

      Item Oak Brook National avg. Difference
      Gasoline $3.20$3.064.7%
      Tire Balancing $67.63$65.213.7%

      Utilities

      Item Oak Brook National avg. Difference
      All Electricity $188.44$220.1214.4%
      Phone $213.97$195.719.3%
      Although the cost of living data is updated regularly, this cost of living information is to be used as estimates only as prices can change on an ongoing basis.

      Nearby cities with low cost of living

      City Population Cost of Living Index National Avg.
      Hodgkins, IL1,8178713.0%
      Dixmoor, IL3,663918.7%
      Hometown, IL4,350937.3%
      Robbins, IL5,241936.6%
      Blue Island, IL23,702973.0%
      Oak Brook, IL8,377203103.0%

      Cities with similar population

      City Population Cost of Living Index National Avg.
      Hillsdale, MI8,3768416.0%
      Summit Park, UT8,37417474.1%
      St. Martin, MS8,380919.4%
      Banff, AB8,380n/a 
      London, KY8,371909.7%
      Oak Brook, IL8,377203103.0%
      Date & Last Updated: This data reflects 2025 and was released from C2ER in January, 2026; this is the most current data available.
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