Decatur Flag

Decatur

County:
Macon County
County Seat:
Yes
Area (mi²):
43.476
State:
Illinois

Decatur is a city located in Macon County, Illinois. Decatur has a 2025 population of 67,165. It is also the county seat of Macon County. Decatur is currently declining at a rate of -1.11% annually and its population has decreased by -5.3% since the most recent census, which recorded a population of 70,927 in 2020.

The average household income in Decatur is $71,363 with a poverty rate of 19.13%.The median age in Decatur is 39.9 years: 38.6 years for males, and 41.2 years for females.

67.2K
Total Population
1,545
Density (mi²)
-752 -1.11%
Growth

Decatur Population

Decatur Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Decatur includes 67.19% White, 24.07% Black or African American, and smaller percentages for Asian, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White47,28167.19%
Black or African American16,94124.07%
Two or more races4,3366.16%
Asian9661.37%
Other race7501.07%
Native Hawaiian or Pacific Islander690.1%
Native American250.04%

Decatur Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Decatur's average per capita income is $42,551. Household income levels show a median of $50,809. The poverty rate stands at 19.13%.

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$85,663-
Families$73,245$92,176
Households$50,809$71,363
Non Families$38,626$47,185

$42,551

Average Income

$50,809

Median Household Income

19.13%

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)