2026 Compare Cities People:
Oceanside, CA vs Belvidere, IL

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Highlights
- Belvidere is 0% more densely populated than Oceanside.
- People are 18.0% less likely to be married in Belvidere.
- The Median Age is 0.2 years younger in Belvidere.
 Oceanside, CABelvidere, ILUnited States
 Population  Unlock25,179329,725,481
 Female Population50.1%  Unlock50.5%
 Male Population49.9%  Unlock49.5%
 Median Age  Unlock36.938.4
 space3
 Population - 2010167,944  Unlock309,327,143
 Population - 2000  Unlock20,820285,036,114
 Population - 1990128,398  Unlock251,960,433
 Pop. 2000 to Now  Unlock18.8%15.6%
 Pop. 1990 to Now36.0%  Unlock30.8%
 space4
 Population Density  Unlock2,085.993.4
 Land Area41.2  Unlock3,531,905.4
 Water Area  Unlock0.2264,836.8
 space
 Est. Total Population By Age
 Oceanside, CABelvidere, ILUnited States
 Age 0 to 46.0%  Unlock5.9%
 Age 5 to 9  Unlock7.1%6.1%
 Age 10 to 146.6%  Unlock6.6%
 Age 15 to 17  Unlock3.6%3.9%
 Age 18 to 203.6%  Unlock4.0%
 Age 21 to 24  Unlock4.5%5.2%
 Age 25 to 3416.0%  Unlock13.8%
 Age 35 to 44  Unlock11.9%12.9%
 Age 45 to 5411.8%  Unlock12.6%
 Age 55 to 59  Unlock7.5%6.7%
 Age 60 to 646.6%  Unlock6.3%
 Age 65 to 74  Unlock10.1%9.6%
 Age 75 to 844.5%  Unlock4.5%
 Age 85 and over  Unlock1.4%1.9%
 space1
 Race
 Oceanside, CABelvidere, ILUnited States
 White44.2%  Unlock59.4%
 Black  Unlock1.3%12.2%
 Asian7.5%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.5%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races4.9%  Unlock3.2%
 Hispanic  Unlock36.4%18.4%
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 Marriage & Family
 Oceanside, CABelvidere, ILUnited States
 Married Population51.3%  Unlock49.8%
     Currently Married  Unlock39.9%48.0%
 Married but Separated1.6%  Unlock1.8%
 Single Population  Unlock58.0%50.2%
 Never Married32.7%  Unlock33.8%
 Divorced  Unlock14.5%10.8%
 Widowed4.9%  Unlock5.6%
 space5
 Household Size  Unlock2.712.60
 Households60,838  Unlock124,010,992
 Family Households  Unlock5,82980,755,759
     Married couple, w/children30.9%  Unlock30.5%
     Married couple, no children  Unlock37.6%42.9%
 Non Family Households19,088  Unlock43,255,233
     Single householder, w/children  Unlock23.0%15.8%
     Single householder, no children10.5%  Unlock10.8%
Reviews for Oceanside    20 Reviews

Over 7 years ago

I've lived in here since 1988, left in 1995 and came back in 2005. I will always love Oceanside. You have to come check it out. It has changed so drastically and there  More

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Over 8 years ago

from oceanside ca love the city always love the beach life u can't get anywhere else yes... it has been cleaned up and welcomes people from all over . I miss my  More

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Moved to O'Side Nov 1988 (Lived there from 78 thru 79 prior to moving back in 88). 78-1979 was a Fun, Good, Relaxing Time to Live in O'Side- Low Crime Rate, Low  More

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Reviews for Belvidere    4 Reviews

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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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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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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