2025 Compare Cities People:
Olathe, KS vs Grayslake, IL

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Highlights
- Grayslake is 0% more densely populated than Olathe.
- People are 2.6% less likely to be married in Grayslake.
- The Median Age is 1.8 years older in Grayslake.
 Olathe, KSGrayslake, ILUnited States
 Population  Unlock20,827329,725,481
 Female Population50.2%  Unlock50.5%
 Male Population49.8%  Unlock49.5%
 Median Age  Unlock37.738.4
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 Population - 2010126,253  Unlock309,327,143
 Population - 2000  Unlock18,506285,036,114
 Population - 199063,352  Unlock251,960,433
 Pop. 2000 to Now  Unlock11.2%15.6%
 Pop. 1990 to Now123.6%  Unlock30.8%
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 Population Density  Unlock1,896.093.4
 Land Area61.6  Unlock3,531,905.4
 Water Area  Unlock0.2264,836.8
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 Est. Total Population By Age
 Olathe, KSGrayslake, ILUnited States
 Age 0 to 46.5%  Unlock5.9%
 Age 5 to 9  Unlock5.9%6.1%
 Age 10 to 148.0%  Unlock6.6%
 Age 15 to 17  Unlock4.3%3.9%
 Age 18 to 203.5%  Unlock4.0%
 Age 21 to 24  Unlock6.0%5.2%
 Age 25 to 3412.9%  Unlock13.8%
 Age 35 to 44  Unlock13.2%12.9%
 Age 45 to 5413.5%  Unlock12.6%
 Age 55 to 59  Unlock7.7%6.7%
 Age 60 to 644.7%  Unlock6.3%
 Age 65 to 74  Unlock7.6%9.6%
 Age 75 to 843.2%  Unlock4.5%
 Age 85 and over  Unlock1.2%1.9%
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 Race
 Olathe, KSGrayslake, ILUnited States
 White74.9%  Unlock59.4%
 Black  Unlock6.9%12.2%
 Asian4.2%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.6%0.4%
 Two or More Races3.2%  Unlock3.2%
 Hispanic  Unlock9.8%18.4%
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 Marriage & Family
 Olathe, KSGrayslake, ILUnited States
 Married Population59.4%  Unlock49.8%
     Currently Married  Unlock56.7%48.0%
 Married but Separated1.0%  Unlock1.8%
 Single Population  Unlock42.2%50.2%
 Never Married27.3%  Unlock33.8%
 Divorced  Unlock8.4%10.8%
 Widowed3.6%  Unlock5.6%
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 Household Size  Unlock2.652.60
 Households50,141  Unlock124,010,992
 Family Households  Unlock5,43280,755,759
     Married couple, w/children40.9%  Unlock30.5%
     Married couple, no children  Unlock44.5%42.9%
 Non Family Households12,938  Unlock43,255,233
     Single householder, w/children  Unlock7.4%15.8%
     Single householder, no children6.4%  Unlock10.8%
Reviews for Olathe    15 Reviews

I've lived in Olathe for 12 years. Olathe is a quiet bedroom community with great schools. 21st Century program provides many career path choices at the high school  More

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Over 7 years ago

I'm just going to give it right to ya! Olathe is closer of a normal mid-class neighborhood than say; Overland Park$$$. And if you like hoe-down country style, go South  More

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Lived in Olathe since about 1980. I can say Olathe is a great place to make a living, live life etc. It's one of those places that the UPS driver can leave a package  More

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Reviews for Grayslake    3 Reviews

Over 11 years ago

Property tax is one of the highest in the nation a $220000 home will cost you $10980 in taxes annually as of 9/2014 This information can be verified on the  More

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Grayslake weather is very difficult to enjoy outdoor activities. In summer, it is SO humid and hot and full of mosquitos that you cannot enjoy a beautiful summer night.  More

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Over 15 years ago

3% of home value annually/ A $300,000 home will cost you 10K in annual property taxes. Where does it all  More

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