Assumption

County:: Christian County
County Seat:: No
Area (mi²):: 0.99
State:: Illinois

Assumption is a city located in Christian County, Illinois. Assumption has a 2025 population of 1,091. Assumption is currently declining at a rate of -1% annually and its population has decreased by -4.72% since the most recent census, which recorded a population of 1,145 in 2020.

The average household income in Assumption is $61,198 with a poverty rate of 11.32%. The median age in Assumption is 34.3 years: 35.7 years for males, and 29.9 years for females.

Demographics

The racial composition of Assumption includes 85.59% White, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Native American, Asian, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native Hawaiian or Pacific Islander

Native American

Asian

Other race

Race	Population	Percentage (of total)
White	956	85.59%
Two or more races	130	11.64%
Black or African American	27	2.42%
Native Hawaiian or Pacific Islander	3	0.27%
Native American	1	0.09%
Asian	0	0%
Other race	0	0%

Assumption Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Assumption's average per capita income is $49,167. Household income levels show a median of $55,764. The poverty rate stands at 11.32%.

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	$80,714	-
Families	$68,194	$71,715
Households	$55,764	$61,198
Non Families	$47,679	$50,179

$49,167

Average Income

$55,764

Median Household Income

11.32%

Poverty Rate