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2026 Compare Cities People:
Oak Brook, IL vs Northlake, IL

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Highlights
- Northlake is 0% more densely populated than Oak Brook.
- People are 34.0% less likely to be married in Northlake.
- The Median Age is 16.2 years younger in Northlake.
 Oak Brook, ILNorthlake, ILUnited States
 Population  Unlock12,836329,725,481
 Female Population52.7%  Unlock50.5%
 Male Population47.3%  Unlock49.5%
 Median Age  Unlock37.738.4
 space3
 Population - 20107,970  Unlock309,327,143
 Population - 2000  Unlock11,878285,036,114
 Population - 19909,178  Unlock251,960,433
 Pop. 2000 to Now  Unlock1.2%15.6%
 Pop. 1990 to Now-12.3%  Unlock30.8%
 space4
 Population Density  Unlock4,046.793.4
 Land Area8.0  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Oak Brook, ILNorthlake, ILUnited States
 Age 0 to 44.3%  Unlock5.9%
 Age 5 to 9  Unlock6.5%6.1%
 Age 10 to 146.6%  Unlock6.6%
 Age 15 to 17  Unlock5.1%3.9%
 Age 18 to 202.6%  Unlock4.0%
 Age 21 to 24  Unlock4.9%5.2%
 Age 25 to 344.4%  Unlock13.8%
 Age 35 to 44  Unlock16.2%12.9%
 Age 45 to 549.1%  Unlock12.6%
 Age 55 to 59  Unlock7.4%6.7%
 Age 60 to 644.4%  Unlock6.3%
 Age 65 to 74  Unlock9.0%9.6%
 Age 75 to 8412.0%  Unlock4.5%
 Age 85 and over  Unlock2.1%1.9%
 space1
 Race
 Oak Brook, ILNorthlake, ILUnited States
 White61.8%  Unlock59.4%
 Black  Unlock3.3%12.2%
 Asian30.3%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races2.2%  Unlock3.2%
 Hispanic  Unlock61.3%18.4%
 space2
 Marriage & Family
 Oak Brook, ILNorthlake, ILUnited States
 Married Population62.3%  Unlock49.8%
     Currently Married  Unlock38.5%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock58.9%50.2%
 Never Married19.3%  Unlock33.8%
 Divorced  Unlock10.3%10.8%
 Widowed12.3%  Unlock5.6%
 space5
 Household Size  Unlock2.792.60
 Households3,071  Unlock124,010,992
 Family Households  Unlock3,06180,755,759
     Married couple, w/children29.5%  Unlock30.5%
     Married couple, no children  Unlock32.9%42.9%
 Non Family Households684  Unlock43,255,233
     Single householder, w/children  Unlock21.9%15.8%
     Single householder, no children11.4%  Unlock10.8%
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Learn More About Oak Brook, Illinois
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