Assumption Flag

Assumption

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

Assumption is a city located in Christian County, Illinois. Assumption has a 2025 population of 1,115 . Assumption is currently declining at a rate of -0.71% annually and its population has decreased by -3.46% since the most recent census, which recorded a population of 1,155 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. For every 100 females there are 89.0 males.

1.1K
Total Population
1,126
Density (mi²)
-8 -0.71%
Growth

Assumption Population

Assumption Population

Data after 2023 is projected based on recent change

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 and multiracial populations.

Population by Race

White (85.59%)

Two or more races (11.64%)

Black or African American (2.42%)

Native Hawaiian or Pacific Islander (0.27%)

Native American (0.09%)

Race
Population
Percentage (of total)
White95685.59%
Two or more races13011.64%
Black or African American272.42%
Native Hawaiian or Pacific Islander30.27%
Native American10.09%

Assumption Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)