Population density (sq mi)2,23222891
Median age36.337.437.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)67%55%55%
Families w/ Kids under 1857%44%43%
Speak English84%77%79%
Speak Spanish10%13%13%

Key findings

  • The population density in Oswego is 879% higher than Illinois
  • The median age in Oswego is 3% lower than Illinois
  • In Oswego 83.49% of the population is White
  • In Oswego 6.78% of the population is Black
  • In Oswego 4.75% of the population is Asian

Compare Oswego, IL Demographics


      Oswego population breakdown by race

      American Indian0.09%0.23%0.82%
      Native Hawaiian0.00%0.03%0.18%
      Mixed race2.55%2.34%3.06%
      Other race2.34%5.86%4.75%
      In Oswego, 14.1% 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

      Oswego age breakdown

      Marital status

      Age of children in married couples

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