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2025 Compare Cities People:
Naperville, IL vs Mercer Island, WA

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Highlights
- Mercer Island is 0% more densely populated than Naperville.
- People are 4.6% more likely to be married in Mercer Island.
- The Median Age is 6.2 years older in Mercer Island.
 Naperville, ILMercer Island, WAUnited States
 Population  Unlock25,506329,725,481
 Female Population50.5%  Unlock50.5%
 Male Population49.5%  Unlock49.5%
 Median Age  Unlock45.538.4
 space3
 Population - 2010142,408  Unlock309,327,143
 Population - 2000  Unlock22,036285,036,114
 Population - 199085,351  Unlock251,960,433
 Pop. 2000 to Now  Unlock17.6%15.6%
 Pop. 1990 to Now73.4%  Unlock30.8%
 space4
 Population Density  Unlock3,995.993.4
 Land Area38.8  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Naperville, ILMercer Island, WAUnited States
 Age 0 to 46.0%  Unlock5.9%
 Age 5 to 9  Unlock7.3%6.1%
 Age 10 to 147.8%  Unlock6.6%
 Age 15 to 17  Unlock4.3%3.9%
 Age 18 to 203.2%  Unlock4.0%
 Age 21 to 24  Unlock2.9%5.2%
 Age 25 to 3411.3%  Unlock13.8%
 Age 35 to 44  Unlock11.8%12.9%
 Age 45 to 5415.0%  Unlock12.6%
 Age 55 to 59  Unlock7.9%6.7%
 Age 60 to 645.9%  Unlock6.3%
 Age 65 to 74  Unlock10.4%9.6%
 Age 75 to 843.5%  Unlock4.5%
 Age 85 and over  Unlock3.8%1.9%
 space1
 Race
 Naperville, ILMercer Island, WAUnited States
 White65.1%  Unlock59.4%
 Black  Unlock0.8%12.2%
 Asian20.6%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.7%0.4%
 Two or More Races3.2%  Unlock3.2%
 Hispanic  Unlock3.2%18.4%
 space2
 Marriage & Family
 Naperville, ILMercer Island, WAUnited States
 Married Population61.8%  Unlock49.8%
     Currently Married  Unlock64.3%48.0%
 Married but Separated0.9%  Unlock1.8%
 Single Population  Unlock35.3%50.2%
 Never Married27.2%  Unlock33.8%
 Divorced  Unlock7.9%10.8%
 Widowed4.0%  Unlock5.6%
 space5
 Household Size  Unlock2.602.60
 Households53,234  Unlock124,010,992
 Family Households  Unlock6,90380,755,759
     Married couple, w/children42.3%  Unlock30.5%
     Married couple, no children  Unlock48.1%42.9%
 Non Family Households13,419  Unlock43,255,233
     Single householder, w/children  Unlock4.6%15.8%
     Single householder, no children5.3%  Unlock10.8%
Voting
Reviews for Naperville    26 Reviews
Liza · Austin, TX
People here don't know how good they have it
Over 2 years ago

Naperville has a lot to offer. The schools are top notch, it is close to Chicago with a commuter rail that is easily accessible and fast, there are lots of parks and  More

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A · Naperville, IL
Downtown Naperville
Over 3 years ago

Lived around the area my whole life, moved to the downtown Naperville 7 years ago and wow has it changed and not for the better. There is way too much traffic and no  More

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elizabeth · Hinsdale, IL
View of naperville
Over 7 years ago

Went with my real estate agent to check out a few houses in Naperville.First impression was the town was adorable especially the downtown but way too many people.couldnt  More

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Reviews for Mercer Island    4 Reviews
Megan · Mercer Island, WA
Nice place to live with great schools
Over 17 years ago

Mercer Island is a wonderful family community. It feels much more "small town" than a city even though it has a population of 20,000+. People say hello and watch out  More

   |    Reply
A resident · Mercer Island, WA
Mercer Island - Is there a "there" there?
Over 17 years ago

Mercer Island is a suburb of Seattle, located on an island in Lake Washington. The best thing about Mercer Island is its strategically central location relative to the  More

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A resident · Mercer Island, WA
Mercer Island, WA - a suburb on an island
Over 17 years ago

Mercer Island is a suburb of Seattle, located on an island in Lake Washington. The best thing about Mercer Island is its strategically central location relative to the  More

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Learn More About Naperville, Illinois
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Learn More About Mercer Island, Washington
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