Foster Flag

Foster

County:
Madison County
County Seat:
No
Area (mi²):
30.372
State:
Illinois

Foster is located in Madison County, Illinois. Foster has a 2025 population of 3,858. Foster is currently declining at a rate of -0.03% annually and its population has decreased by -0.69% since the most recent census, which recorded a population of 3,885 in 2020.

The average household income in Foster is $117,170 with a poverty rate of 6.95%. The median age in Foster is 53.5 years: 54.6 years for males, and 52.4 years for females.

3.9K
Total Population
127
Density (mi²)
-1 -0.03%
Growth

Foster Population

Foster Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Foster includes 95.45% White, and smaller percentages for Two or more races, Black or African American, Asian, other race and multiracial populations.

Population by Race

White (95.5%)

Two or more races (2.0%)

Black or African American (1.7%)

Asian (0.9%)

Other race (0.0%)

Race
Population
Percentage (of total)
White3,69595.45%
Two or more races761.96%
Black or African American661.7%
Asian330.85%
Other race10.03%

Foster Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Foster's average per capita income is $61,080. Household income levels show a median of $108,688. The poverty rate stands at 6.95%.

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$135,488-
Families$121,607$131,770
Households$108,688$117,170
Non Families$58,289$68,220

$61,080

Average Income

$108,688

Median Household Income

6.95%

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)