CITY
Marathon
Florida · 10,060 residents (2025 est.) · 8.446 sq mi
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Part of the Key West micropolitan area
Notable rankings
#156Shortest commutesof 6,82613.7The short version
Marathon has roughly average household income, with a median household income of $89,355. Population has declined 3% since 2000. Median home value has more than tripled since 2000, reaching $725,800. With a median age of 45.6, the population is older than the US median of 38.9.
At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 45.6
US median: 38.9
Average education
33% hold a bachelor's degree
US average: 36%
Less affordable
home values up 166%, inflation adjusted
US median home: $376,019
Section 01
Population & growth
PEP 2025 EST:10,060 residents (Census Bureau Vintage 2025, released March 2026)
Population, 1990 – 2024
202410K
Age distribution, 2024
Under 56.1%(600)
5 to 95.1%(503)
10 to 147%(695)
15 to 193.7%(364)
20 to 244.2%(414)
25 to 349.5%(944)
35 to 4413.6%(1,351)
45 to 5415.3%(1,521)
55 to 6414.8%(1,463)
65 to 7411.9%(1,184)
75 to 847.8%(769)
85 and over1.1%(106)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$89,355
+36%inflation adjusted, since 2000
from $36,010 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
56.6%
+28.9 ptssince 2009
from 27.7% in 2009
US average: 53.3%
Workforce by industry, 2024
Information12.3%
Wholesale trade11.8%
Finance & insurance6.4%
Other services5.2%
Agriculture, forestry, fishing4.7%
Construction4.7%
Professional, scientific, technical3.6%
Education & health services2.8%
Transportation & warehousing2%
Public administration1.8%
Arts, entertainment, food1.1%
Retail trade0.7%
Manufacturing0%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$725,800
+166%inflation adjusted, since 2000
from $149,700 in 2000
US average: $376,019
1990 – 2024
8.1
−7%since 2009
from 8.7 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
57
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Marathon on RentDataNow
Section 04
Race & ethnicity
2000
White, non-Hispanic73.3%(7,513)
Black4.4%(449)
Hispanic / Latino20.4%(2,095)
Asian0.5%(47)
Other0%
2024
White, non-Hispanic59.5%(5,902)
Black2.1%(210)
Hispanic / Latino34.2%(3,395)
Asian0.3%(34)
Other3.8%(373)
66
+27%since 2009
from 52 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Cuban22.8%(2,259)
Central American5.2%(515)
Nicaraguan3.1%(306)
South American2.7%(268)
Guatemalan1.5%(151)
Mexican1.3%(130)
Venezuelan1.3%(127)
Argentine0.9%(91)
Dominican0.7%(69)
Honduran0.5%(50)
Puerto Rican0.4%(38)
Peruvian0.3%(29)
+ 2 more hispanic origin groups with data
Colombian0.2%(21)
Salvadoran0.1%(8)
Pacific Islander origin
Native Hawaiian0.1%(14)
Ancestry
German14.6%(1,450)
English9.8%(972)
Irish9.2%(911)
French4.8%(480)
Italian4.3%(427)
American3.9%(387)
Polish3%(295)
Scottish1.4%(135)
Swedish1.2%(117)
Russian0.9%(90)
West Indian0.9%(88)
French Canadian0.6%(61)
+ 26 more ancestry groups with data
Welsh0.6%(60)
Haitian0.6%(59)
Dutch0.6%(57)
Norwegian0.6%(57)
British0.6%(56)
Hungarian0.4%(39)
Austrian0.4%(38)
Swiss0.4%(38)
Subsaharan African0.3%(29)
Finnish0.2%(24)
Portuguese0.2%(24)
Brazilian0.2%(23)
Scotch-Irish0.2%(21)
Czech0.2%(20)
Canadian0.2%(19)
Greek0.2%(19)
Ukrainian0.2%(19)
Belgian0.2%(18)
Trinidadian & Tobagonian0.2%(16)
Jamaican0.1%(13)
Danish0.1%(11)
Armenian0.1%(10)
Croatian0.1%(7)
Slovak0.1%(7)
Latvian0%(2)
Nigerian0%(1)
Section 05
Education
High school or higher
90.5%
+10.0 ptssince 2000
from 80.5% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Section 08
People & community
Marital status
Men 15+
Never married26.8%(1,134)
Married55.6%(2,354)
Widowed3.5%(148)
Divorced14.1%(596)
Women 15+
Never married22.6%(879)
Married59.1%(2,294)
Widowed4.6%(179)
Divorced13.7%(532)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
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Compare Marathon to nearby cities
MARATHON VS
Key Largo
Income$85,778−4%
Home value$643,900−11%
Population13,026+29%
SEE FULL COMPARISON →
MARATHON VS
Key West
Income$87,037−3%
Home value$852,400+17%
Population24,999+148%
SEE FULL COMPARISON →
MARATHON VS
Florida City
Income$47,482−47%
Home value$399,200−45%
Population13,576+35%
SEE FULL COMPARISON →
MARATHON VS
Homestead
Income$65,423−27%
Home value$380,000−48%
Population86,242+757%
SEE FULL COMPARISON →
Frequently asked
How many people live in Marathon, Florida?
Marathon, Florida has about 9,914 residents according to the 2024 American Community Survey.
What is the median household income in Marathon, Florida?
The typical household in Marathon, Florida earns about $89,355 a year. Half of households make more than that, and half make less.
Is Marathon, Florida expensive?
In Marathon, Florida, the median home is worth about $725,800, and the typical rent is about $1,633 a month.
How educated are people in Marathon, Florida?
About 33.1% of adults age 25 and over in Marathon, Florida hold a bachelor's degree or higher.
What is the poverty rate in Marathon, Florida?
About 13.4% of people in Marathon, Florida live below the federal poverty line.
Has Marathon, Florida grown since 1990?
Yes, Marathon, Florida has grown since 1990. The population has added about 1,057 residents, a change of about 12 percent over that period.
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FloridaDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024