2025 Compare Cities People:
Boulder, CO vs Crystal Lake, IL

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Highlights
- Crystal Lake is 0% more densely populated than Boulder.
- People are 81.1% more likely to be married in Crystal Lake.
- The Median Age is 10.6 years older in Crystal Lake.
 Boulder, COCrystal Lake, ILUnited States
 Population  Unlock40,082329,725,481
 Female Population48.5%  Unlock50.5%
 Male Population51.5%  Unlock49.5%
 Median Age  Unlock39.538.4
 space3
 Population - 201097,724  Unlock309,327,143
 Population - 2000  Unlock38,000285,036,114
 Population - 199083,312  Unlock251,960,433
 Pop. 2000 to Now  Unlock4.3%15.6%
 Pop. 1990 to Now29.2%  Unlock30.8%
 space4
 Population Density  Unlock2,127.093.4
 Land Area26.3  Unlock3,531,905.4
 Water Area  Unlock0.6264,836.8
 space
 Est. Total Population By Age
 Boulder, COCrystal Lake, ILUnited States
 Age 0 to 42.7%  Unlock5.9%
 Age 5 to 9  Unlock7.0%6.1%
 Age 10 to 143.6%  Unlock6.6%
 Age 15 to 17  Unlock5.2%3.9%
 Age 18 to 2016.2%  Unlock4.0%
 Age 21 to 24  Unlock4.6%5.2%
 Age 25 to 3416.3%  Unlock13.8%
 Age 35 to 44  Unlock14.9%12.9%
 Age 45 to 5410.3%  Unlock12.6%
 Age 55 to 59  Unlock7.4%6.7%
 Age 60 to 644.2%  Unlock6.3%
 Age 65 to 74  Unlock9.6%9.6%
 Age 75 to 843.1%  Unlock4.5%
 Age 85 and over  Unlock1.7%1.9%
 space1
 Race
 Boulder, COCrystal Lake, ILUnited States
 White78.3%  Unlock59.4%
 Black  Unlock0.9%12.2%
 Asian5.9%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races3.5%  Unlock3.2%
 Hispanic  Unlock12.5%18.4%
 space2
 Marriage & Family
 Boulder, COCrystal Lake, ILUnited States
 Married Population31.9%  Unlock49.8%
     Currently Married  Unlock57.1%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock42.1%50.2%
 Never Married56.1%  Unlock33.8%
 Divorced  Unlock8.3%10.8%
 Widowed2.5%  Unlock5.6%
 space5
 Household Size  Unlock2.762.60
 Households42,610  Unlock124,010,992
 Family Households  Unlock11,07380,755,759
     Married couple, w/children33.3%  Unlock30.5%
     Married couple, no children  Unlock44.0%42.9%
 Non Family Households25,269  Unlock43,255,233
     Single householder, w/children  Unlock12.3%15.8%
     Single householder, no children8.5%  Unlock10.8%
Reviews for Boulder    55 Reviews

Outside of the university, Boulder had a very distinctive "wealthy hippy" feel. A lot of alternative medicine and a matching ethos. This is changing some among my  More

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We moved here from Texas about 4 years ago and love it here! The amazing sense of community and high regard for the environment are two of the main reasons we love  More

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Over 5 years ago

Most people do much worse than Boulder. I'm the most critical person I've ever met who is never happy or satisfied -- so that's a pretty huge compliment.   More

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Reviews for Crystal Lake    7 Reviews

Over 11 years ago

Great area for recreational boating, fishing and biking. Great place to involve your kids as there are lots of opportunities' for football, baseball and dance. For  More

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Over 12 years ago

I have been living here for 12 years. It's a nice community with friendly people, but I hate the weather. It feels like winter is 6 months long with many overcast days,  More

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Over 12 years ago

A nice place to raise a family, but not a lot of diversity. We are looking to move from here and searching in the Colorado  More

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