St. Joseph demographics profile

StatisticSt. JosephIllinoisNational
Population density (sq mi)1,97023191
Median age33.837.037.4
Male/Female ratio0.8:11.0:11.0:1
Married (15yrs & older)64%55%55%
Speak English98%78%79%
Speak Spanish0%13%13%

Did you know?

  • The population density in St. Joseph is 752% higher than Illinois.
  • The median age in St. Joseph is 9% lower than Illinois.
  • In St. Joseph 98.01% of the population is Caucasian.
  • In St. Joseph 0.05% of the population is African American.
  • In St. Joseph 0.61% of the population is Asian.

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St. Joseph population breakdown by race

RaceSt. JosephIllinoisNational
African American0.05%14.37%12.60%
American Indian0.00%0.22%0.82%
Native Hawaiian0.00%0.03%0.17%
Mixed race1.32%2.16%2.91%
Other race0.00%5.84%4.70%
In St. Joseph, 0.9% 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.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

St. Joseph age breakdown

Marital status

Age of children in married couples

Source: The St. Joseph, IL demographics data displayed above is derived from the United States Census Bureau.