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2025 Compare Cities People:
Mercer Island, WA vs Sammamish, WA

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Highlights
- Sammamish is 0% more densely populated than Mercer Island.
- People are 9.2% more likely to be married in Sammamish.
- The Median Age is 6.3 years younger in Sammamish.
 Mercer Island, WASammamish, WAUnited States
 Population  Unlock66,532329,725,481
 Female Population52.9%  Unlock50.5%
 Male Population47.1%  Unlock49.5%
 Median Age  Unlock39.238.4
 space3
 Population - 201022,770  Unlock309,327,143
 Population - 2000  Unlock34,104285,036,114
 Population - 199020,816  Unlock251,960,433
 Pop. 2000 to Now  Unlock93.4%15.6%
 Pop. 1990 to Now24.5%  Unlock30.8%
 space4
 Population Density  Unlock3,255.593.4
 Land Area6.4  Unlock3,531,905.4
 Water Area  Unlock3.7264,836.8
 space
 Est. Total Population By Age
 Mercer Island, WASammamish, WAUnited States
 Age 0 to 43.8%  Unlock5.9%
 Age 5 to 9  Unlock7.3%6.1%
 Age 10 to 148.2%  Unlock6.6%
 Age 15 to 17  Unlock6.3%3.9%
 Age 18 to 202.5%  Unlock4.0%
 Age 21 to 24  Unlock2.9%5.2%
 Age 25 to 348.2%  Unlock13.8%
 Age 35 to 44  Unlock18.2%12.9%
 Age 45 to 5416.9%  Unlock12.6%
 Age 55 to 59  Unlock6.5%6.7%
 Age 60 to 646.5%  Unlock6.3%
 Age 65 to 74  Unlock5.6%9.6%
 Age 75 to 845.5%  Unlock4.5%
 Age 85 and over  Unlock0.5%1.9%
 space1
 Race
 Mercer Island, WASammamish, WAUnited States
 White66.8%  Unlock59.4%
 Black  Unlock1.6%12.2%
 Asian21.3%  Unlock5.6%
 Native American  Unlock0.3%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races6.9%  Unlock3.2%
 Hispanic  Unlock3.5%18.4%
 space2
 Marriage & Family
 Mercer Island, WASammamish, WAUnited States
 Married Population64.7%  Unlock49.8%
     Currently Married  Unlock70.0%48.0%
 Married but Separated0.4%  Unlock1.8%
 Single Population  Unlock29.3%50.2%
 Never Married21.7%  Unlock33.8%
 Divorced  Unlock4.8%10.8%
 Widowed5.8%  Unlock5.6%
 space5
 Household Size  Unlock3.032.60
 Households9,758  Unlock124,010,992
 Family Households  Unlock19,13880,755,759
     Married couple, w/children42.3%  Unlock30.5%
     Married couple, no children  Unlock34.7%42.9%
 Non Family Households2,855  Unlock43,255,233
     Single householder, w/children  Unlock7.1%15.8%
     Single householder, no children5.0%  Unlock10.8%
Voting
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

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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

   |    Reply

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Reviews for Sammamish    4 Reviews
Paula · Sammamish, WA
Soggy in Seattle
Over 10 years ago

Seattle has beautiful greenery and gorgeous mountain views. It is quite dark and gloomy for much of the late fall into spring...or July 5th as locals know quite well. I  More

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Loren · Sammamish, WA
Seems expensive, but worth it
Over 11 years ago

Housing seems to be very overpriced, however after all things considered, it is well worth it. (Family of  More

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Noelle · Sammamish, WA
Sammamish is an all-around great place to live!
Over 13 years ago

Sammamish is honestly a wonderful place to live. It's perfect for a family who wants a comfortable entertaining suburban life. The schools are pretty great, as I can say  More

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Learn More About Mercer Island, Washington
Overview
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Learn More About Sammamish, Washington
Overview
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