Marathon, FL Profile: Facts, Map & Data


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Marathon, Florida - Basic Facts

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The City of Marathon had a population of 8,654 as of July 1, 2016.

The primary coordinate point for Marathon is located at latitude 24.7323 and longitude -81.0251 in Monroe County. The formal boundaries for the City of Marathon (see map below) encompass a land area of 8.44 sq. miles and a water area of 0.83 sq. miles. Monroe County is in the Eastern time zone (GMT -5). The elevation is 3 feet.

The City of Marathon (GNIS ID: 2405014) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Florida is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Marathon is located within Middle Keys CCD of Monroe County.

Beneath the boundary map are tables with Marathon population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


City of Marathon, FL Boundary Map

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Boundary Maps: Middle Keys CCD | Monroe County | Florida Counties

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Marathon, FL Data & Demographics (As of July 1, 2016)


Total Population 8,654
Population in Households 8,543
Population in Familes 6,131
Population in Group Qrtrs 111
Population Density1 1,025
Diversity Index2 55


Total Households 3,826
Average Household Size 2.23
Family Households 2,247
Average Family Size 3


Total Housing Units 6,597 (100%)
Owner Occupied HU 1,961 (29.7%)
Renter Occupied HU 1,865 (28.3%)
Vacant Housing Units 2,771 (42.0%)
Median Home Value $347,901
Average Home Value $408,503


Median Household Income $48,789
Average Household Income $74,874
Per Capita Income $33,469
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.67% 1.02%
Households 0.45% 0.89%
Families 0.22% 0.78%
Median Household Income   2.51%
Per Capita Income   2.05%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Marathon, FL - Peer Comparisons by Rank and Percentile

The table below compares Marathon to the other 919 incorporated cities, towns and CDPs in Florida by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 343 63rd
Population Density1 # 577 37th
Diversity Index2 # 352 62nd
Median Household Income # 394 57th
Per Capita Income # 228 75th

Additional comparisons and rankings can be made with a VERY EASY TO USE Florida Census Data Comparison Tool.

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