Dupo

County:: St. Clair County
County Seat:: No
Area (mi²):: 6.403
State:: Illinois

Dupo is a village located in St. Clair County, Illinois. Dupo has a 2025 population of 3,717. Dupo is currently declining at a rate of -1.38% annually and its population has decreased by -6.51% since the most recent census, which recorded a population of 3,976 in 2020.

The average household income in Dupo is $76,366 with a poverty rate of 9.91%. The median age in Dupo is 43.1 years: 39.3 years for males, and 43.7 years for females.

Demographics

The racial composition of Dupo includes 87.02% White, 6.64% Black or African American, and smaller percentages for Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	3,406	87.02%
Black or African American	260	6.64%
Two or more races	248	6.34%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Dupo Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Dupo's average per capita income is $36,282. Household income levels show a median of $57,899. The poverty rate stands at 9.91%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$87,645	-
Families	$73,552	$88,259
Households	$57,899	$76,366
Non Families	$39,350	$47,140

$36,282

Average Income

$57,899

Median Household Income

9.91%

Poverty Rate