2025 Compare Cities People:
Mercer Island, WA vs Berkeley, CA

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Highlights
- Berkeley is 0% more densely populated than Mercer Island.
- People are 46.9% less likely to be married in Berkeley.
- The Median Age is 13.4 years younger in Berkeley.
 Mercer Island, WABerkeley, CAUnited States
 Population  Unlock119,607329,725,481
 Female Population52.9%  Unlock50.5%
 Male Population47.1%  Unlock49.5%
 Median Age  Unlock32.138.4
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 Population - 201022,770  Unlock309,327,143
 Population - 2000  Unlock102,743285,036,114
 Population - 199020,816  Unlock251,960,433
 Pop. 2000 to Now  Unlock19.5%15.6%
 Pop. 1990 to Now24.5%  Unlock30.8%
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 Population Density  Unlock11,419.493.4
 Land Area6.4  Unlock3,531,905.4
 Water Area  Unlock7.2264,836.8
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 Est. Total Population By Age
 Mercer Island, WABerkeley, CAUnited States
 Age 0 to 43.8%  Unlock5.9%
 Age 5 to 9  Unlock3.2%6.1%
 Age 10 to 148.2%  Unlock6.6%
 Age 15 to 17  Unlock2.5%3.9%
 Age 18 to 202.5%  Unlock4.0%
 Age 21 to 24  Unlock11.3%5.2%
 Age 25 to 348.2%  Unlock13.8%
 Age 35 to 44  Unlock10.8%12.9%
 Age 45 to 5416.9%  Unlock12.6%
 Age 55 to 59  Unlock5.2%6.7%
 Age 60 to 646.5%  Unlock6.3%
 Age 65 to 74  Unlock10.1%9.6%
 Age 75 to 845.5%  Unlock4.5%
 Age 85 and over  Unlock1.4%1.9%
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 Race
 Mercer Island, WABerkeley, CAUnited States
 White66.8%  Unlock59.4%
 Black  Unlock7.3%12.2%
 Asian21.3%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.7%0.4%
 Two or More Races6.9%  Unlock3.2%
 Hispanic  Unlock12.0%18.4%
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 Marriage & Family
 Mercer Island, WABerkeley, CAUnited States
 Married Population64.7%  Unlock49.8%
     Currently Married  Unlock33.0%48.0%
 Married but Separated0.4%  Unlock1.8%
 Single Population  Unlock65.7%50.2%
 Never Married21.7%  Unlock33.8%
 Divorced  Unlock7.4%10.8%
 Widowed5.8%  Unlock5.6%
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 Household Size  Unlock2.402.60
 Households9,758  Unlock124,010,992
 Family Households  Unlock20,64180,755,759
     Married couple, w/children42.3%  Unlock30.5%
     Married couple, no children  Unlock47.9%42.9%
 Non Family Households2,855  Unlock43,255,233
     Single householder, w/children  Unlock11.2%15.8%
     Single householder, no children5.0%  Unlock10.8%
Reviews for Mercer Island    4 Reviews

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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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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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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Reviews for Berkeley    14 Reviews

Have lived in Berkeley for about 35 years now. Housing/Real Estate: If you're looking to move here, $1,000,000 will get you a small cottage in the "flats". Most of  More

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Over 12 years ago

We have the best climate -- summers and winters are mild. Lots of  More

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Over 14 years ago

The 60's have left Berkeley and now it is about MONEY...and the people there have plenty of it and nice hybrid cars (looks like 2 per household) and with a great bicycle  More

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