Auburn Flag

Auburn

County:
Sangamon County
County Seat:
No
Area (mi²):
4.124
State:
Illinois

Auburn is a city located in Sangamon County, Illinois. Auburn has a 2026 population of 4,406. Auburn is currently declining at a rate of -0.52% annually and its population has decreased by -3.08% since the most recent census, which recorded a population of 4,546 in 2020.

The median household income in Auburn is $81,411 with a poverty rate of 8.08%. The median age in Auburn is 40.1 years: 35.9 years for males, and 44.7 years for females. For every 100 females there are 88.4 males.

4.4K
Total Population
1,068
Density (mi²)
-23 -0.52%
Growth

Auburn Population

Auburn Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20264,406-23-0.52%
20254,429-24-0.54%
20244,453-8-0.18%
20234,461-16-0.36%
20224,477-38-0.84%
20214,515-38-0.83%
20204,546-82-1.77%
20194,628-44-0.94%
20184,672-38-0.81%
20174,710-43-0.9%
20164,753-33-0.69%
20154,786-28-0.58%
20144,814-2-0.04%
20134,816-9-0.19%
20124,825-7-0.14%
20114,832150.31%
20104,817460.96%
20004,31759315.92%
19903,7241082.99%
19803,6161,02239.4%
19702,594-66-2.48%
19202,66000%

Median Age

Overall: 40.1 years
Female: 44.7 years
Male: 35.9 years

Auburn Adults

There are 3,246 adults, (706 of whom are seniors) in Auburn.

Sex Ratio

Female: 2,285 (53.1%)
Male: 2,021 (46.9%)

Demographics

The racial composition of Auburn includes 96.56% White, and smaller percentages for Two or more races, Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White4,15896.56%
Two or more races1092.53%
Black or African American390.91%
Race
Population ↓
Percentage (of total)
White2014.67%
Two or more races340.79%
Race
Population ↓
Percentage (of total)
White3,95791.9%
Two or more races751.74%
Black or African American390.91%

Auburn Marital Status

Economics and Income Statistics

Auburn 's average per capita income is $54,172. Household income levels show a median of $81,411. The poverty rate stands at 8.08%.

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$117,207-
Families$108,333$120,043
Households$81,411$95,809
Non Families$35,729$42,339

$54,172

Average Income

$81,411

Median Household Income

8.08%

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)