HomeIllinoisDuPage CountyOak Brook
Oak Brook, Illinois: commercial real estate data.
Oak Brook is a Census village of 8,056 people across 7.98 square miles of land, in DuPage County. Median household income is $175,870, 91.1 percent of occupied homes are owned, and the SBA record carries 38 7(a) approvals to borrowers here worth $43.0 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Oak Brook
What Oak Brook is
- Census place typevillage
- Land area7.98 sq mi
- Water area0.32 sq mi
- Population per square mile of land1,010
- County holding the largest share of its areaDuPage County, 99.9 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Oak Brook
How many people live in Oak Brook
- Population8,056
- Median age55.2
- Population under 181,443 plus or minus 296
- Share under 1817.9 percent plus or minus 3.7
- Population 65 and over2,746
- Share 65 and over34.1 percent
- Households3,061
- Family households2,279
- Share of households that are families74.5 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Oak Brook
Income and work in Oak Brook
- Median household income$175,870
- Per capita income$104,806
- Civilian labor force3,242
- Employed2,918
- Unemployed324 plus or minus 177
- Unemployment rate10.0 percent plus or minus 5.4
- Adults 25 and over6,019
- Adults 25 and over with a high school diploma or higher96.9 percent
- Adults 25 and over with a bachelor degree or higher66.4 percent
- Adults 25 and over with a graduate degree34.3 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Oak Brook
Housing in Oak Brook
- Housing units3,373
- Occupied units3,061
- Vacant units312 plus or minus 134
- Vacancy rate9.2 percent plus or minus 3.9
- Owner occupied2,789
- Renter occupied272 plus or minus 132
- Ownership rate91.1 percent
- Median owner-occupied home value$903,200
- Median gross rent, monthly$2,590 plus or minus $629
- Annual rent as a share of median income17.7 percent plus or minus 4.5
- Single family units2,962
- Share single family87.8 percent
- Units in buildings of two or more411 plus or minus 128
- Share in buildings of two or more12.2 percent plus or minus 3.7
- Mobile homes0
- Median year structure built1979
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Oak Brook
How Oak Brook gets to work
- Workers 16 and over who commute2,249
- Commuting under 15 minutes425 plus or minus 144
- Share commuting under 15 minutes18.9 percent plus or minus 5.9
- Commuting 30 minutes or more993 plus or minus 232
- Share commuting 30 minutes or more44.2 percent
- Drove alone69.8 percent
- Carpooled5.2 percent plus or minus 2.9
- Public transport2.5 percent plus or minus 1.9
- Walked1.6 percent plus or minus 2.1
- Worked from home20.9 percent plus or minus 5.4
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Oak Brook
SBA loans in Oak Brook (7(a))
- Approvals38
- Gross approval$42,973,600
- Average approval$1,130,884
- Median approval$610,100
- Ninetieth percentile approval$3,345,500
- Largest approval$5,000,000
- Jobs supported696
- Jobs per approval18.3
- Loans with a final outcome7
- Paid in full7
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more18.4 percent
- Share to franchises7.9 percent
- Distinct lenders20
- Distinct industries by NAICS31
Counted by borrower city: approvals to borrowers whose address is in Oak Brook, in any county, FY2020 to FY2026. Only 7 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Oak Brook
SBA loans in Oak Brook (504)
- Approvals9
- Gross approval$7,857,000
- Average approval$873,000
- Median approval$882,000
- Largest approval$1,461,000
- Jobs supported78
- Loans with a final outcome1
- Charged off0
- Median term240 months
- Distinct CDCs3
Counted by borrower city: approvals to borrowers whose address is in Oak Brook, in any county, FY2010 to FY2026. Only 1 loan has reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Oak Brook
Flood risk in Oak Brook
- NFIP communityVillage of Oak Brook
- NFIP community number170214
- Participating in the NFIPYes
- Community Rating System classClass 7
- Currently effective map date08/01/19
The Village of Oak Brook participates in the National Flood Insurance Program as community 170214 and carries Community Rating System class 7, a flood insurance premium discount for policies written there.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
DuPage County, not Oak Brook
DuPage County context, not Oak Brook figures
- Establishments in DuPage County34,121
- Covered employment, DuPage County622,113
- Average annual pay, DuPage County$79,674
- Housing units permitted, DuPage County1,450
Every figure in this section is published for DuPage County as a whole and is not a measurement of Oak Brook.
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Oak Brook questions, answered from the record.
How many people live in Oak Brook, Illinois?
8,056, in 3,061 households. Oak Brook village covers 7.98 square miles of land, which is 1,010 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Oak Brook in?
DuPage County, which holds 99.9 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Oak Brook?
$175,870. The median owner-occupied home is valued at $903,200. Median gross rent is $2,590 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Oak Brook businesses?
38 7(a) approvals totaling $43.0 m since FY2020, across 20 lenders, median approval $610,100, plus 9 504 approvals worth $7.9 m since FY2010. These count approvals to borrowers whose address is in Oak Brook, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Oak Brook borrowers get paid back?
No rate is published for Oak Brook. Only 7 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is Oak Brook in the National Flood Insurance Program?
Yes. Oak Brook appears in the FEMA Community Status Book as Oak Brook, village of, community 170214, carrying Community Rating System class 7, which is a premium discount for exceeding the program minimum. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Oak Brook figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for DuPage County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Oak Brook.
Is zoning published for Oak Brook?
No. Nothing on this page presents parcel level zoning.