Population density (sq mi)1,49322891
Median age34.937.437.7
Male/Female ratio0.7:11.0:11.0:1
Married (15yrs & older)58%55%55%
Families w/ Kids under 1857%44%43%
Speak English99%77%79%
Speak Spanish1%13%13%

Key findings

  • The population density in Petersburg is 555% higher than Illinois
  • The median age in Petersburg is 7% lower than Illinois
  • In Petersburg 96.44% of the population is White
  • In Petersburg 0.30% of the population is Black
  • In Petersburg 0.00% of the population is Asian

Compare Petersburg, IL Demographics


      Petersburg population breakdown by race

      American Indian0.00%0.23%0.82%
      Native Hawaiian1.20%0.03%0.18%
      Mixed race1.80%2.34%3.06%
      Other race0.26%5.86%4.75%
      In Petersburg, 1.0% 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

      Petersburg age breakdown

      Marital status

      Age of children in married couples

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