Decatur Flag

Decatur

County:
Macon County
County Seat:
Yes
Area (mi²):
29.065
State:
Illinois

Decatur is located in Macon County, Illinois. Decatur has a 2025 population of 45,948 . It is also the county seat of Macon County . Decatur is currently declining at a rate of -0.11% annually and its population has decreased by -3.3% since the most recent census, which recorded a population of 47,517 in 2020.

The average household income in Decatur is $64,252 with a poverty rate of 23.52%. The median age in Decatur is 37.5 years: 36.1 years for males, and 39 years for females. For every 100 females there are 91.3 males.

45.9K
Total Population
1,581
Density (mi²)
-51 -0.11%
Growth

Decatur Population

Decatur Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Decatur includes 62.22% White, 27.83% Black or African American, and smaller percentages for Asian, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White (62.22%)

Black or African American (27.83%)

Two or more races (7.75%)

Asian (1.03%)

Other race (0.99%)

Native Hawaiian or Pacific Islander (0.13%)

Native American (0.05%)

Race
Population
Percentage (of total)
White29,22562.22%
Black or African American13,07327.83%
Two or more races3,6397.75%
Asian4831.03%
Other race4640.99%
Native Hawaiian or Pacific Islander590.13%
Native American250.05%

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 $40,820. Household income levels show a median of $47,734. The poverty rate stands at 23.52%.

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$79,179$98,767
Families$63,750$81,372
Households$47,734$64,252
Non Families$36,602$44,248

$40,820

Average Income

$47,734

Median Household Income

23.52%

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)