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2026 Compare Cities People:
Belvidere, IL vs Mountain Brook, AL

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Highlights
- Mountain Brook is 0% more densely populated than Belvidere.
- People are 66.5% more likely to be married in Mountain Brook.
- The Median Age is 5.0 years older in Mountain Brook.
 Belvidere, ILMountain Brook, ALUnited States
 Population  Unlock22,184329,725,481
 Female Population52.3%  Unlock50.5%
 Male Population47.7%  Unlock49.5%
 Median Age  Unlock41.938.4
 space3
 Population - 201025,598  Unlock309,327,143
 Population - 2000  Unlock20,604285,036,114
 Population - 199015,958  Unlock251,960,433
 Pop. 2000 to Now  Unlock-2.8%15.6%
 Pop. 1990 to Now55.0%  Unlock30.8%
 space4
 Population Density  Unlock1,729.893.4
 Land Area12.1  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Belvidere, ILMountain Brook, ALUnited States
 Age 0 to 45.9%  Unlock5.9%
 Age 5 to 9  Unlock6.8%6.1%
 Age 10 to 147.2%  Unlock6.6%
 Age 15 to 17  Unlock5.1%3.9%
 Age 18 to 204.5%  Unlock4.0%
 Age 21 to 24  Unlock1.6%5.2%
 Age 25 to 3413.4%  Unlock13.8%
 Age 35 to 44  Unlock10.9%12.9%
 Age 45 to 5413.5%  Unlock12.6%
 Age 55 to 59  Unlock5.0%6.7%
 Age 60 to 644.8%  Unlock6.3%
 Age 65 to 74  Unlock12.1%9.6%
 Age 75 to 844.4%  Unlock4.5%
 Age 85 and over  Unlock3.2%1.9%
 space1
 Race
 Belvidere, ILMountain Brook, ALUnited States
 White60.1%  Unlock59.4%
 Black  Unlock0.4%12.2%
 Asian0.9%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races1.1%  Unlock3.2%
 Hispanic  Unlock0.2%18.4%
 space2
 Marriage & Family
 Belvidere, ILMountain Brook, ALUnited States
 Married Population42.0%  Unlock49.8%
     Currently Married  Unlock69.9%48.0%
 Married but Separated2.1%  Unlock1.8%
 Single Population  Unlock30.0%50.2%
 Never Married36.6%  Unlock33.8%
 Divorced  Unlock4.5%10.8%
 Widowed6.9%  Unlock5.6%
 space5
 Household Size  Unlock2.652.60
 Households9,193  Unlock124,010,992
 Family Households  Unlock6,31580,755,759
     Married couple, w/children26.5%  Unlock30.5%
     Married couple, no children  Unlock44.6%42.9%
 Non Family Households3,364  Unlock43,255,233
     Single householder, w/children  Unlock3.4%15.8%
     Single householder, no children12.9%  Unlock10.8%
Voting
Reviews for Belvidere    4 Reviews
John · Rockford, IL
A place you don't want to live
Over 12 years ago

The town is full of gangs from chicago that spay paint everything. The police are like nazi storm troopers. The court system is full of good ole boys. The only honorable  More

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Jacki · Belvidere, IL
old fashioned small midwest town
Over 12 years ago

People from the Chicago suburbs can't believe the low cost of housing. Schools are good. Easy to go to the city or an  More

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Dawn · Belvidere, IL
Cost of living GEM!
Over 18 years ago

I recently moved back to Belvidere from the suburbs of Chicago. I am very happy to find that the cost of living is far cheaper than anyother place I have found in IL (&  More

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Reviews for Mountain Brook    1 Reviews
John  · Atlanta, GA
WOW!
Over 19 years ago

Life's good in Mountain Brook! My father was in a hospital for surgery in Birmingham. I got lost and found myself wandering through gorgeous, wooded Montain Brook. Very  More

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Learn More About Belvidere, Illinois
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