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2025 Compare Cities People:
Marco Island, FL vs Key Biscayne, FL

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Highlights
- Key Biscayne is 0% more densely populated than Marco Island.
- People are 21.8% less likely to be married in Key Biscayne.
- The Median Age is 25.2 years younger in Key Biscayne.
 Marco Island, FLKey Biscayne, FLUnited States
 Population  Unlock14,530329,725,481
 Female Population50.1%  Unlock50.5%
 Male Population49.9%  Unlock49.5%
 Median Age  Unlock41.738.4
 space3
 Population - 201016,453  Unlock309,327,143
 Population - 2000  Unlock10,507285,036,114
 Population - 19909,980  Unlock251,960,433
 Pop. 2000 to Now  Unlock21.2%15.6%
 Pop. 1990 to Now81.3%  Unlock30.8%
 space4
 Population Density  Unlock11,652.093.4
 Land Area12.2  Unlock3,531,905.4
 Water Area  Unlock0.5264,836.8
 space
 Est. Total Population By Age
 Marco Island, FLKey Biscayne, FLUnited States
 Age 0 to 41.0%  Unlock5.9%
 Age 5 to 9  Unlock7.2%6.1%
 Age 10 to 142.9%  Unlock6.6%
 Age 15 to 17  Unlock6.8%3.9%
 Age 18 to 200.7%  Unlock4.0%
 Age 21 to 24  Unlock3.9%5.2%
 Age 25 to 343.4%  Unlock13.8%
 Age 35 to 44  Unlock11.7%12.9%
 Age 45 to 548.1%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 649.7%  Unlock6.3%
 Age 65 to 74  Unlock7.3%9.6%
 Age 75 to 8423.8%  Unlock4.5%
 Age 85 and over  Unlock1.4%1.9%
 space1
 Race
 Marco Island, FLKey Biscayne, FLUnited States
 White89.4%  Unlock59.4%
 Black  Unlock0.3%12.2%
 Asian0.8%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races1.1%  Unlock3.2%
 Hispanic  Unlock74.3%18.4%
 space2
 Marriage & Family
 Marco Island, FLKey Biscayne, FLUnited States
 Married Population75.5%  Unlock49.8%
     Currently Married  Unlock58.7%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock41.0%50.2%
 Never Married8.9%  Unlock33.8%
 Divorced  Unlock7.5%10.8%
 Widowed8.9%  Unlock5.6%
 space5
 Household Size  Unlock3.172.60
 Households8,131  Unlock124,010,992
 Family Households  Unlock3,58480,755,759
     Married couple, w/children9.3%  Unlock30.5%
     Married couple, no children  Unlock32.8%42.9%
 Non Family Households2,395  Unlock43,255,233
     Single householder, w/children  Unlock8.6%15.8%
     Single householder, no children3.1%  Unlock10.8%
Voting
Reviews for Marco Island    3 Reviews
Lani · San Diego, CA
Absolute Paradise (island life)
Over 4 years ago

We just purchased a home here from San Diego, Ca. Marco island is so refreshing! It is Clean, no trash, people care about their yards and community with impeccable  More

   |    Reply
Kathryn · Marco Island, FL
Great Place to Retire To
Over 8 years ago

We moved here upon retirement and have been delighted with our new community. With canals crisscrossing the entire island, most homesites are on the water, and we enjoy  More

   |    Reply
Ernie  · Homestead, FL
Outsiders not welcomed at Marco Island
Over 9 years ago

I have been coming to Marco Island for the past couple of years to spend the 4th of July with my family in this beautiful city, but never again. From what we learned  More

   |    Reply

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Reviews for Key Biscayne    0 Reviews

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Learn More About Marco Island, Florida
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