StatisticMason CityIowaNational
Population density (sq mi)9915791
Median age42.638.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)53%60%55%
Families w/ Kids under 1842%44%43%
Speak English96%92%79%
Speak Spanish2%4%13%

Key findings

  • The population density in Mason City is 1639% higher than Iowa
  • The median age in Mason City is 12% higher than Iowa
  • In Mason City 93.92% of the population is White
  • In Mason City 1.90% of the population is Black
  • In Mason City 1.25% of the population is Asian

Compare Mason City, IA Demographics


      Mason City population breakdown by race

      RaceMason CityIowaNational
      American Indian0.34%0.32%0.82%
      Native Hawaiian0.00%0.08%0.18%
      Mixed race1.95%1.97%3.06%
      Other race0.65%1.27%4.75%
      In Mason City, 4.9% 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

      Mason City age breakdown

      Marital status

      Age of children in married couples

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