Illiopolis township Flag

Illiopolis township

County:
Sangamon County
County Seat:
No
Area (mi²):
33.978
State:
Illinois

Illiopolis township is located in Sangamon County, Illinois. Illiopolis township has a 2025 population of 1,179. Illiopolis township is currently declining at a rate of -0.76% annually and its population has decreased by -2.96% since the most recent census, which recorded a population of 1,215 in 2020.

The average household income in Illiopolis township is $96,282 with a poverty rate of 5.87%. The median age in Illiopolis township is 42.6 years: 40 years for males, and 50.1 years for females.

1.2K
Total Population
35
Density (mi²)
-9 -0.76%
Growth

Illiopolis township Population

Illiopolis township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Illiopolis township includes 96.11% White, and smaller percentages for Two or more races, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White1,35896.11%
Two or more races312.19%
Black or African American191.34%
Asian50.35%
Native American00%
Native Hawaiian or Pacific Islander00%
Other race00%

Illiopolis township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Illiopolis township's average per capita income is $54,946. Household income levels show a median of $88,833. The poverty rate stands at 5.87%.

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$115,179-
Families$107,589$122,181
Households$88,833$96,282
Non Families$26,042$36,840

$54,946

Average Income

$88,833

Median Household Income

5.87%

Poverty Rate

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)