Population density (sq mi)1,5585791
Median age36.438.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)57%60%55%
Families w/ Kids under 1848%44%43%
Speak English83%92%79%
Speak Spanish13%4%13%

Key findings

  • The population density in Ottumwa is 2633% higher than Iowa
  • The median age in Ottumwa is 4% lower than Iowa
  • In Ottumwa 87.87% of the population is White
  • In Ottumwa 3.16% of the population is Black
  • In Ottumwa 1.27% of the population is Asian

Compare Ottumwa, IA Demographics


      Ottumwa population breakdown by race

      American Indian0.08%0.32%0.82%
      Native Hawaiian0.28%0.08%0.18%
      Mixed race1.54%1.97%3.06%
      Other race5.80%1.27%4.75%
      In Ottumwa, 13.8% 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

      Ottumwa age breakdown

      Marital status

      Age of children in married couples

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