Population density (sq mi)2,86422891
Median age40.037.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)54%55%55%
Families w/ Kids under 1841%44%43%
Speak English75%77%79%
Speak Spanish16%13%13%

Key findings

  • The population density in Knollwood is 1156% higher than Illinois
  • The median age in Knollwood is 7% higher than Illinois
  • In Knollwood 90.34% of the population is White
  • In Knollwood 1.04% of the population is Black
  • In Knollwood 2.78% of the population is Asian

Compare Knollwood, IL Demographics


      Knollwood population breakdown by race

      American Indian0.00%0.23%0.82%
      Native Hawaiian0.00%0.03%0.18%
      Mixed race3.35%2.34%3.06%
      Other race2.49%5.86%4.75%
      In Knollwood, 23.7% 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

      Knollwood age breakdown

      Marital status

      Age of children in married couples

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