Population density (sq mi)1,1135791
Median age36.538.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)52%60%55%
Families w/ Kids under 1844%44%43%
Speak English89%92%79%
Speak Spanish5%4%13%

Key findings

  • The population density in Waterloo is 1853% higher than Iowa
  • The median age in Waterloo is 4% lower than Iowa
  • In Waterloo 76.22% of the population is White
  • In Waterloo 15.72% of the population is Black
  • In Waterloo 1.97% of the population is Asian

Compare Waterloo, IA Demographics


      Waterloo population breakdown by race

      American Indian0.39%0.32%0.82%
      Native Hawaiian0.37%0.08%0.18%
      Mixed race2.88%1.97%3.06%
      Other race2.44%1.27%4.75%
      In Waterloo, 6.2% 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

      Waterloo age breakdown

      Marital status

      Age of children in married couples

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