Key Largo vs Marathon

A side-by-side comparison of Key Largo and Marathon: population, income, housing, and more.

Key Largo and Marathon are places in Florida. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Key Largo has the higher population (12,069 vs 9,831 in Marathon). Marathon has the higher median household income ($80,556 vs $78,906 in Key Largo). Marathon has the higher median home value ($683,700 vs $626,300 in Key Largo).

Population, income & housing

	Key Largo	Marathon
Population	12,069	9,831
Median age	51.2 yrs	45.6 yrs
Median household income	$78,906	$80,556
Median home value	$626,300	$683,700
Median gross rent	$1,889	$1,592
Housing units	8,570	6,442
Homeownership rate	76.2%	57.8%
Bachelor's degree or higher	37.6%	33.0%
Unemployment rate	4.7%	5.4%

Trends (ACS 5-year, 2019–2023)

	Key Largo	Marathon
Population	9,952 → 12,069 (+21.3%)	8,702 → 9,831 (+13.0%)
Median household income	$65,864 → $78,906 (+19.8%)	$56,365 → $80,556 (+42.9%)
Median home value	$421,900 → $626,300 (+48.4%)	$425,200 → $683,700 (+60.8%)
Median gross rent	$1,449 → $1,889 (+30.4%)	$1,319 → $1,592 (+20.7%)

Key Largo

Population

9,95212,069

Median household income

$65,864$78,906

Median home value

$421,900$626,300

Median gross rent

$1,449$1,889

Marathon

Population

8,7029,831

Median household income

$56,365$80,556

Median home value

$425,200$683,700

Median gross rent

$1,319$1,592

Age & race/ethnicity

Age distribution (share)

	Key Largo	Marathon
Under 5	2.2%	5.4%
5 to 17	12.0%	14.7%
18 to 24	6.5%	5.1%
25 to 34	8.0%	10.3%
35 to 44	13.6%	13.5%
45 to 54	13.2%	16.1%
55 to 64	16.6%	14.0%
65 to 74	16.2%	12.4%
75 and over	11.7%	8.4%

Race & ethnicity (share)

	Key Largo	Marathon
White (non-Hispanic)	66.5%	59.3%
Black or African American	1.4%	3.9%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.3%	0.4%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	1.2%	0.1%
Two or more races	1.3%	3.2%
Hispanic or Latino	29.2%	33.1%

Educational attainment (age 25+)

Share of adults 25+

	Key Largo	Marathon
No high school diploma	6.0%	9.7%
High school graduate	30.3%	29.6%
Some college or associate's	26.2%	27.7%
Bachelor's degree	23.5%	19.4%
Graduate or professional degree	14.1%	13.5%

Commute to work

How workers get to work (share)

	Key Largo	Marathon
Drove alone	73.8%	62.0%
Carpooled	11.1%	10.6%
Public transit	1.5%	0.0%
Walked	1.9%	11.8%
Bicycle	1.2%	1.0%
Worked from home	9.0%	10.9%
Other means	1.4%	3.6%

Housing

Units in structure (share)

	Key Largo	Marathon
1-unit, detached	62.5%	49.5%
1-unit, attached	2.8%	8.3%
2 to 4 units	7.4%	8.1%
5 to 19 units	6.2%	11.4%
20 or more units	4.0%	9.8%
Mobile home & other	17.1%	12.8%

Poverty & households

	Key Largo	Marathon
Poverty rate	8.3%	11.4%
Average household size	2.39	2.46
Mean commute (minutes)	25	13
Median year structure built	1983	1980