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2025 Compare Cities People:
Siesta Key, FL vs Boulder, CO

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Highlights
- Boulder is 0% more densely populated than Siesta Key.
- People are 51.6% less likely to be married in Boulder.
- The Median Age is 38.2 years younger in Boulder.
 Siesta Key, FLBoulder, COUnited States
 Population  Unlock104,930329,725,481
 Female Population51.2%  Unlock50.5%
 Male Population48.8%  Unlock49.5%
 Median Age  Unlock28.938.4
 space3
 Population - 20106,573  Unlock309,327,143
 Population - 2000  Unlock94,673285,036,114
 Population - 19907,772  Unlock251,960,433
 Pop. 2000 to Now  Unlock13.7%15.6%
 Pop. 1990 to Now-17.6%  Unlock30.8%
 space4
 Population Density  Unlock3,991.493.4
 Land Area2.3  Unlock3,531,905.4
 Water Area  Unlock1.0264,836.8
 space
 Est. Total Population By Age
 Siesta Key, FLBoulder, COUnited States
 Age 0 to 41.0%  Unlock5.9%
 Age 5 to 9  Unlock3.7%6.1%
 Age 10 to 142.2%  Unlock6.6%
 Age 15 to 17  Unlock2.5%3.9%
 Age 18 to 200.6%  Unlock4.0%
 Age 21 to 24  Unlock13.8%5.2%
 Age 25 to 343.0%  Unlock13.8%
 Age 35 to 44  Unlock10.3%12.9%
 Age 45 to 548.4%  Unlock12.6%
 Age 55 to 59  Unlock4.5%6.7%
 Age 60 to 6411.0%  Unlock6.3%
 Age 65 to 74  Unlock7.0%9.6%
 Age 75 to 8422.9%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 Siesta Key, FLBoulder, COUnited States
 White92.9%  Unlock59.4%
 Black  Unlock1.0%12.2%
 Asian1.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.3%0.4%
 Two or More Races1.8%  Unlock3.2%
 Hispanic  Unlock10.6%18.4%
 space2
 Marriage & Family
 Siesta Key, FLBoulder, COUnited States
 Married Population66.0%  Unlock49.8%
     Currently Married  Unlock31.2%48.0%
 Married but Separated0.8%  Unlock1.8%
 Single Population  Unlock68.1%50.2%
 Never Married11.5%  Unlock33.8%
 Divorced  Unlock9.5%10.8%
 Widowed10.6%  Unlock5.6%
 space5
 Household Size  Unlock2.212.60
 Households2,948  Unlock124,010,992
 Family Households  Unlock17,34180,755,759
     Married couple, w/children7.6%  Unlock30.5%
     Married couple, no children  Unlock47.4%42.9%
 Non Family Households1,160  Unlock43,255,233
     Single householder, w/children  Unlock10.8%15.8%
     Single householder, no children4.4%  Unlock10.8%
Voting
Reviews for Siesta Key    2 Reviews
Mac · Chico, CA
Perfect November through April!!
Over 17 years ago

May through October is another story! Heat, humidity and mozzies with 4 inch wingspans. Welcome to the Gulf  More

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Rich · Sarasota, FL
climate and lifestyle
Over 18 years ago

like any sub-tropical paradise, the climate is the best and the worst all rolled into one. Today is Dec. 28th, 2007, the temperature is 82, the breeze is on, life is as  More

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Reviews for Boulder    55 Reviews
Guess · Boulder, CO
Expensive and requires liking a unique culture
Over 4 years ago

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

   |    Reply
Linda · Boulder, CO
I love it here! Such a beautiful and friendly city
Over 5 years ago

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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H · Denver, CO
Snob says it's ok
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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Learn More About Siesta Key, Florida
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