StatisticQuincyIllinoisNational
Population40,68912,671,821328,239,523
Population density (sq mi)2,56422891
Median age39.937.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)57%55%55%
Families w/ Kids under 1844%44%43%
Speak English98%77%79%
Speak Spanish1%13%13%

Key findings

  • The population density in Quincy is 1024% higher than Illinois
  • The median age in Quincy is 7% higher than Illinois
  • In Quincy 89.98% of the population is White
  • In Quincy 5.73% of the population is Black
  • In Quincy 1.04% of the population is Asian

Compare Quincy, IL Demographics

      vs

      Quincy population breakdown by race

      RaceQuincyIllinoisNational
      White89.98%72.14%73.35%
      Black5.73%14.30%12.63%
      Asian1.04%5.10%5.22%
      American Indian0.16%0.23%0.82%
      Native Hawaiian0.13%0.03%0.18%
      Mixed race2.03%2.34%3.06%
      Other race0.93%5.86%4.75%
      In Quincy, 1.7% 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

      Quincy age breakdown

      Marital status

      Age of children in married couples

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