Population density (sq mi)1,03141091
Median age41.741.637.7
Male/Female ratio1.2:11.0:11.0:1
Married (15yrs & older)46%54%55%
Families w/ Kids under 1831%38%43%
Speak English66%72%79%
Speak Spanish30%21%13%

Key findings

  • The population density in Marathon is 151% higher than Florida
  • The median age in Marathon is equal to Florida
  • In Marathon 90.13% of the population is White
  • In Marathon 5.51% of the population is Black
  • In Marathon 1.60% of the population is Asian

Compare Marathon, FL Demographics


      Marathon population breakdown by race

      American Indian0.00%0.27%0.82%
      Native Hawaiian0.00%0.06%0.18%
      Mixed race1.47%2.48%3.06%
      Other race1.30%2.54%4.75%
      In Marathon, 35.5% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Marathon age breakdown

      Marital status

      Age of children in married couples

      Source: The Marathon, FL demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).