Population density (sq mi)3605791
Median age47.338.037.7
Male/Female ratio1.1:11.0:11.0:1
Married (15yrs & older)62%60%55%
Families w/ Kids under 1831%44%43%
Speak English88%92%79%
Speak Spanish13%4%13%

Key findings

  • The population density in Marathon is 532% higher than Iowa
  • The median age in Marathon is 24% higher than Iowa
  • In Marathon 98.15% of the population is White
  • In Marathon 0.00% of the population is Black
  • In Marathon 0.00% of the population is Asian

Compare Marathon, IA Demographics


      Marathon population breakdown by race

      American Indian0.00%0.32%0.82%
      Native Hawaiian0.00%0.08%0.18%
      Mixed race1.85%1.97%3.06%
      Other race0.00%1.27%4.75%
      In Marathon, 14.8% 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, IA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).