Cooper Flag

Cooper

County:
Sangamon County
County Seat:
No
Area (mi²):
28.536
State:
Illinois

Cooper is located in Sangamon County, Illinois. Cooper has a 2025 population of 865 . Cooper is currently declining at a rate of -0.12% annually and its population has decreased by -1.59% since the most recent census, which recorded a population of 879 in 2020.

The average household income in Cooper is $119,551 with a poverty rate of 0%. The median age in Cooper is 46.8 years: 40.3 years for males, and 48.1 years for females. For every 100 females there are 109.4 males.

865
Total Population
30
Density (mi²)
-1 -0.12%
Growth

Cooper Population

Cooper Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Cooper includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

White (100%)

Race
Population
Percentage (of total)
White758100%

Cooper Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Cooper's average per capita income is $55,188. Household income levels show a median of $127,976. The poverty rate stands at 0%.

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$135,278-
Families$130,227$135,598
Households$127,976$119,551
Non Families$66,452$83,528

$55,188

Average Income

$127,976

Median Household Income

0%

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)