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2025 Compare Cities People:
Marathon, FL vs Key Biscayne, FL

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Highlights
- Key Biscayne is 0% more densely populated than Marathon.
- People are 19.8% more likely to be married in Key Biscayne.
- The Median Age is 7.2 years younger in Key Biscayne.
 Marathon, FLKey Biscayne, FLUnited States
 Population  Unlock14,530329,725,481
 Female Population47.8%  Unlock50.5%
 Male Population52.2%  Unlock49.5%
 Median Age  Unlock41.738.4
 space3
 Population - 20108,319  Unlock309,327,143
 Population - 2000  Unlock10,507285,036,114
 Population - 19908,857  Unlock251,960,433
 Pop. 2000 to Now  Unlock21.2%15.6%
 Pop. 1990 to Now1.4%  Unlock30.8%
 space4
 Population Density  Unlock11,652.093.4
 Land Area8.4  Unlock3,531,905.4
 Water Area  Unlock0.5264,836.8
 space
 Est. Total Population By Age
 Marathon, FLKey Biscayne, FLUnited States
 Age 0 to 44.7%  Unlock5.9%
 Age 5 to 9  Unlock7.2%6.1%
 Age 10 to 146.6%  Unlock6.6%
 Age 15 to 17  Unlock6.8%3.9%
 Age 18 to 203.3%  Unlock4.0%
 Age 21 to 24  Unlock3.9%5.2%
 Age 25 to 349.2%  Unlock13.8%
 Age 35 to 44  Unlock11.7%12.9%
 Age 45 to 5415.5%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 647.9%  Unlock6.3%
 Age 65 to 74  Unlock7.3%9.6%
 Age 75 to 847.1%  Unlock4.5%
 Age 85 and over  Unlock1.4%1.9%
 space1
 Race
 Marathon, FLKey Biscayne, FLUnited States
 White54.4%  Unlock59.4%
 Black  Unlock0.3%12.2%
 Asian0.5%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races1.0%  Unlock3.2%
 Hispanic  Unlock74.3%18.4%
 space2
 Marriage & Family
 Marathon, FLKey Biscayne, FLUnited States
 Married Population49.2%  Unlock49.8%
     Currently Married  Unlock58.7%48.0%
 Married but Separated2.2%  Unlock1.8%
 Single Population  Unlock41.0%50.2%
 Never Married24.8%  Unlock33.8%
 Divorced  Unlock7.5%10.8%
 Widowed7.5%  Unlock5.6%
 space5
 Household Size  Unlock3.172.60
 Households3,996  Unlock124,010,992
 Family Households  Unlock3,58480,755,759
     Married couple, w/children21.4%  Unlock30.5%
     Married couple, no children  Unlock32.8%42.9%
 Non Family Households1,761  Unlock43,255,233
     Single householder, w/children  Unlock8.6%15.8%
     Single householder, no children9.1%  Unlock10.8%
Voting
Reviews for Marathon    1 Reviews
Mark · Marathon, FL
Great climate
Over 14 years ago

Year round  More

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Reviews for Key Biscayne    0 Reviews

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Learn More About Marathon, Florida
Overview
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Learn More About Key Biscayne, Florida
Overview
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