Marathon

County:: Monroe County
County Seat:: No
Area (mi²):: 8.446
State:: Florida

Marathon is a city located in Monroe County, Florida. Marathon has a 2025 population of 9,845. Marathon is currently declining at a rate of -0.02% annually and its population has decreased by -0.1% since the most recent census, which recorded a population of 9,855 in 2020.

The average household income in Marathon is $114,693 with a poverty rate of 11.44%.The median age in Marathon is 45.6 years: 47.3 years for males, and 42.9 years for females.

Demographics

The racial composition of Marathon includes 71.19% White, 4.08% Black or African American, 3.97% other race, and smaller percentages for Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	6,999	71.19%
Two or more races	1,987	20.21%
Black or African American	401	4.08%
Other race	390	3.97%
Asian	54	0.55%

Marathon Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Marathon's average per capita income is $42,466. Household income levels show a median of $80,556. The poverty rate stands at 11.44%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$103,214	-
Families	$100,161	$136,205
Households	$80,556	$114,693
Non Families	$54,097	$77,897

$42,466

Average Income

$80,556

Median Household Income

11.44%

Poverty Rate