Marissa

County:: St. Clair County
County Seat:: No
Area (mi²):: 7.214
State:: Illinois

Marissa is a village located in St. Clair County, Illinois. Marissa has a 2025 population of 1,701. Marissa is currently declining at a rate of -1.45% annually and its population has decreased by -6.95% since the most recent census, which recorded a population of 1,828 in 2020.

The average household income in Marissa is $58,046 with a poverty rate of 19.13%.The median age in Marissa is 46.7 years: 49.1 years for males, and 42.1 years for females.

Demographics

The racial composition of Marissa includes 84.29% White, and smaller percentages for Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	955	84.29%
Two or more races	173	15.27%
Native American	5	0.44%

Marissa Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Marissa's average per capita income is $33,264. Household income levels show a median of $48,393. The poverty rate stands at 19.13%.

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	$74,091	-
Families	$65,446	$70,724
Households	$48,393	$58,046
Non Families	$23,077	$42,667

$33,264

Average Income

$48,393

Median Household Income

19.13%

Poverty Rate