Grand Detour demographics profile

StatisticGrand DetourIllinoisNational
Population density (sq mi)41822291
Median age51.137.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)73%55%55%
Speak English98%77%79%
Speak Spanish2%13%13%
Grand Detour, IL has a population of 489 and is the 19,679th largest city in the United States. The population density is 418 per sq mi which is 88% higher than the Illinois average and 361% higher than the national average. The median age in Grand Detour is 51 which is approximately 37% higher than the Illinois average of 37. In Grand Detour, 73% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 73% of Grand Detour residents were born in Illinois, 27% were born out of state, 0% were born outside of the United States and 0% were foreign born.

Did you know?

  • The population density in Grand Detour is 88% higher than Illinois.
  • The median age in Grand Detour is 37% higher than Illinois.
  • In Grand Detour 100.00% of the population is Caucasian.
  • In Grand Detour 0.00% of the population is African American.
  • In Grand Detour 0.00% of the population is Asian.

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Grand Detour population breakdown by race

RaceGrand DetourIllinoisNational
African American0.00%14.30%12.63%
American Indian0.00%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race0.00%2.34%3.06%
Other race0.00%5.86%4.75%
In Grand Detour, 0.0% 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.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Grand Detour age breakdown

Marital status

Age of children in married couples

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