Foster township

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

Foster township is located in Madison County, Illinois. Foster township has a 2025 population of 3,830. Foster township is currently declining at a rate of -0.23% annually and its population has decreased by -1.34% since the most recent census, which recorded a population of 3,882 in 2020.

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

Demographics

The racial composition of Foster township 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

Race	Population	Percentage (of total)
White	3,695	95.45%
Two or more races	76	1.96%
Black or African American	66	1.7%
Asian	33	0.85%
Other race	1	0.03%

Foster township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Foster township'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