Population density (sq mi)1,02222891
Median age38.537.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)63%55%55%
Families w/ Kids under 1843%44%43%
Speak English85%77%79%
Speak Spanish12%13%13%

Key findings

  • The population density in Marengo is 348% higher than Illinois
  • The median age in Marengo is 3% higher than Illinois
  • In Marengo 92.54% of the population is White
  • In Marengo 0.37% of the population is Black
  • In Marengo 0.16% of the population is Asian

Compare Marengo, IL Demographics


      Marengo population breakdown by race

      American Indian0.64%0.23%0.82%
      Native Hawaiian0.00%0.03%0.18%
      Mixed race5.06%2.34%3.06%
      Other race1.23%5.86%4.75%
      In Marengo, 16.0% 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

      Marengo age breakdown

      Marital status

      Age of children in married couples

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