Island Grove township Flag

Island Grove township

County:
Sangamon County
County Seat:
No
Area (mi²):
28.066
State:
Illinois

Island Grove township is located in Sangamon County, Illinois. Island Grove township has a 2025 population of 560. Island Grove township is currently declining at a rate of -0.36% annually and its population has decreased by -2.27% since the most recent census, which recorded a population of 573 in 2020.

The average household income in Island Grove township is $145,346 with a poverty rate of 4.9%.The median age in Island Grove township is 55.8 years: 53.8 years for males, and 58.5 years for females.

560
Total Population
20
Density (mi²)
-2 -0.36%
Growth

Island Grove township Population

Island Grove township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Island Grove township includes 93.17% White, 6.83% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White53293.17%
Black or African American396.83%

Island Grove township Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Island Grove township's average per capita income is $54,152. Household income levels show a median of $94,500. The poverty rate stands at 4.9%.

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$119,244-
Families$118,750$173,383
Households$94,500$145,346
Non Families$13,281$27,593

$54,152

Average Income

$94,500

Median Household Income

4.9%

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)