2025 Compare Cities People:
South Barrington, IL vs Oak Brook, IL

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Highlights
- Oak Brook is 0% more densely populated than South Barrington.
- People are 19.8% less likely to be married in Oak Brook.
- The Median Age is 4.0 years older in Oak Brook.
 South Barrington, ILOak Brook, ILUnited States
 Population  Unlock8,178329,725,481
 Female Population49.0%  Unlock50.5%
 Male Population51.0%  Unlock49.5%
 Median Age  Unlock53.938.4
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 Population - 20104,581  Unlock309,327,143
 Population - 2000  Unlock8,702285,036,114
 Population - 19902,937  Unlock251,960,433
 Pop. 2000 to Now  Unlock-7.5%15.6%
 Pop. 1990 to Now69.4%  Unlock30.8%
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 Population Density  Unlock1,026.493.4
 Land Area7.4  Unlock3,531,905.4
 Water Area  Unlock0.3264,836.8
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 Est. Total Population By Age
 South Barrington, ILOak Brook, ILUnited States
 Age 0 to 42.4%  Unlock5.9%
 Age 5 to 9  Unlock5.8%6.1%
 Age 10 to 1412.6%  Unlock6.6%
 Age 15 to 17  Unlock3.7%3.9%
 Age 18 to 202.1%  Unlock4.0%
 Age 21 to 24  Unlock3.3%5.2%
 Age 25 to 341.6%  Unlock13.8%
 Age 35 to 44  Unlock11.4%12.9%
 Age 45 to 5419.5%  Unlock12.6%
 Age 55 to 59  Unlock9.5%6.7%
 Age 60 to 647.4%  Unlock6.3%
 Age 65 to 74  Unlock17.8%9.6%
 Age 75 to 843.6%  Unlock4.5%
 Age 85 and over  Unlock5.2%1.9%
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 Race
 South Barrington, ILOak Brook, ILUnited States
 White52.3%  Unlock59.4%
 Black  Unlock0.6%12.2%
 Asian41.6%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander2.4%  Unlock0.2%
 Other  Unlock0.7%0.4%
 Two or More Races2.3%  Unlock3.2%
 Hispanic  Unlock4.5%18.4%
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 Marriage & Family
 South Barrington, ILOak Brook, ILUnited States
 Married Population77.6%  Unlock49.8%
     Currently Married  Unlock60.9%48.0%
 Married but Separated2.1%  Unlock1.8%
 Single Population  Unlock37.7%50.2%
 Never Married15.6%  Unlock33.8%
 Divorced  Unlock6.1%10.8%
 Widowed4.4%  Unlock5.6%
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 Household Size  Unlock2.632.60
 Households1,661  Unlock124,010,992
 Family Households  Unlock2,38780,755,759
     Married couple, w/children32.1%  Unlock30.5%
     Married couple, no children  Unlock52.1%42.9%
 Non Family Households74  Unlock43,255,233
     Single householder, w/children  Unlock7.0%15.8%
     Single householder, no children0.0%  Unlock10.8%
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