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, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

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%
Native Hawaiian or Pacific Islander	0	0%

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