Alton

County:: Madison County
County Seat:: No
Area (mi²):: 15.671
State:: Illinois

Alton is a city located in Madison County, Illinois. Alton has a 2025 population of 24,604. Alton is currently declining at a rate of -0.81% annually and its population has decreased by -3.92% since the most recent census, which recorded a population of 25,608 in 2020.

The average household income in Alton is $66,863 with a poverty rate of 24.47%.The median age in Alton is 38.4 years: 37.6 years for males, and 40.1 years for females.

Demographics

The racial composition of Alton includes 66.7% White, 24.16% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	16,961	66.7%
Black or African American	6,144	24.16%
Two or more races	1,726	6.79%
Asian	289	1.14%
Other race	267	1.05%
Native American	43	0.17%

Alton Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Alton's average per capita income is $39,218. Household income levels show a median of $53,005. The poverty rate stands at 24.47%.

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	$83,696	-
Families	$67,800	$79,635
Households	$53,005	$66,863
Non Families	$34,924	$49,120

$39,218

Average Income

$53,005

Median Household Income

24.47%

Poverty Rate