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 2026 population of 564. Island Grove township is currently declining at a rate of 0% annually and its population has decreased by -1.4% since the most recent census, which recorded a population of 572 in 2020.

The median household income in Island Grove township is $95,208 with a poverty rate of 6.64%. The median age in Island Grove township is 59.3 years: 59.7 years for males, and 53 years for females. For every 100 females there are 95.4 males.

564
Total Population
20
Density (mi²)

Island Grove township Population

Island Grove township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202656400%
202556400%
202456400%
202356400%
2022564-7-1.23%
2021571-1-0.17%
2020572-1-0.17%
2019600-5-0.83%
2018605-6-0.98%
2017611-5-0.81%
2016616-3-0.48%
2015619-2-0.32%
2014621-2-0.32%
2013623-2-0.32%
201262510.16%
201162430.48%
201062100%

Median Age

Overall: 59.3 years
Female: 53 years
Male: 59.7 years

Island Grove township Adults

There are 433 adults, (126 of whom are seniors) in Island Grove township.

Sex Ratio

Female: 239 (51.2%)
Male: 228 (48.8%)

Demographics

The racial composition of Island Grove township includes 98.5% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White46098.5%
Two or more races71.5%
Race
Population ↓
Percentage (of total)
Two or more races40.86%
Race
Population ↓
Percentage (of total)
White46098.5%
Two or more races30.64%

Island Grove township Marital Status

Economics and Income Statistics

Island Grove township 's average per capita income is $100,063. Household income levels show a median of $95,208. The poverty rate stands at 6.64%.

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$172,891-
Non Families$97,292$69,000
Households$95,208$138,773
Families-$182,496

$100,063

Average Income

$95,208

Median Household Income

6.64%

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)