Population density (sq mi)1,1225791
Median age31.038.037.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)46%60%55%
Families w/ Kids under 1836%44%43%
Speak English97%92%79%
Speak Spanish2%4%13%

Key findings

  • The population density in Decorah is 1869% higher than Iowa
  • The median age in Decorah is 18% lower than Iowa
  • In Decorah 95.67% of the population is White
  • In Decorah 1.90% of the population is Black
  • In Decorah 0.99% of the population is Asian

Compare Decorah, IA Demographics


      Decorah population breakdown by race

      American Indian0.41%0.32%0.82%
      Native Hawaiian0.00%0.08%0.18%
      Mixed race0.75%1.97%3.06%
      Other race0.28%1.27%4.75%
      In Decorah, 2.2% 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

      Decorah age breakdown

      Marital status

      Age of children in married couples

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