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2025 Compare Cities People:
Marathon, FL vs Key Colony Beach, FL

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Highlights
- Key Colony Beach is 0% more densely populated than Marathon.
- People are 20.5% more likely to be married in Key Colony Beach.
- The Median Age is 18.0 years older in Key Colony Beach.
 Marathon, FLKey Colony Beach, FLUnited States
 Population  Unlock744329,725,481
 Female Population47.8%  Unlock50.5%
 Male Population52.2%  Unlock49.5%
 Median Age  Unlock66.938.4
 space3
 Population - 20108,319  Unlock309,327,143
 Population - 2000  Unlock788285,036,114
 Population - 19908,857  Unlock251,960,433
 Pop. 2000 to Now  Unlock0.9%15.6%
 Pop. 1990 to Now1.4%  Unlock30.8%
 space4
 Population Density  Unlock1,690.993.4
 Land Area8.4  Unlock3,531,905.4
 Water Area  Unlock0.2264,836.8
 space
 Est. Total Population By Age
 Marathon, FLKey Colony Beach, FLUnited States
 Age 0 to 44.7%  Unlock5.9%
 Age 5 to 9  Unlock0.0%6.1%
 Age 10 to 146.6%  Unlock6.6%
 Age 15 to 17  Unlock1.2%3.9%
 Age 18 to 203.3%  Unlock4.0%
 Age 21 to 24  Unlock0.0%5.2%
 Age 25 to 349.2%  Unlock13.8%
 Age 35 to 44  Unlock2.4%12.9%
 Age 45 to 5415.5%  Unlock12.6%
 Age 55 to 59  Unlock8.7%6.7%
 Age 60 to 647.9%  Unlock6.3%
 Age 65 to 74  Unlock29.2%9.6%
 Age 75 to 847.1%  Unlock4.5%
 Age 85 and over  Unlock9.7%1.9%
 space1
 Race
 Marathon, FLKey Colony Beach, FLUnited States
 White54.4%  Unlock59.4%
 Black  Unlock0.0%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  Unlock6.2%18.4%
 space2
 Marriage & Family
 Marathon, FLKey Colony Beach, FLUnited States
 Married Population49.2%  Unlock49.8%
     Currently Married  Unlock59.3%48.0%
 Married but Separated2.2%  Unlock1.8%
 Single Population  Unlock40.7%50.2%
 Never Married24.8%  Unlock33.8%
 Divorced  Unlock16.7%10.8%
 Widowed7.5%  Unlock5.6%
 space5
 Household Size  Unlock1.812.60
 Households3,996  Unlock124,010,992
 Family Households  Unlock22880,755,759
     Married couple, w/children21.4%  Unlock30.5%
     Married couple, no children  Unlock90.8%42.9%
 Non Family Households1,761  Unlock43,255,233
     Single householder, w/children  Unlock0.0%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 Colony Beach    1 Reviews
Linda · Key Colony Beach, FL
Can't Afford to Live Here in Retirement!
Over 10 years ago

We have owned a small half duplex in the City of KCB for the past 11 years. Now that I am retired and my husband will be retiring in a few years, we need a larger place  More

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Learn More About Marathon, Florida
Overview
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Learn More About Key Colony Beach, Florida
Overview
Cost of Living
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Voting
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