Alton Flag

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 2026 population of 24,632. Alton is currently declining at a rate of -0.67% annually and its population has decreased by -3.92% since the most recent census, which recorded a population of 25,636 in 2020.

The median household income in Alton is $54,568 with a poverty rate of 21.03%. The median age in Alton is 38 years: 36.9 years for males, and 39 years for females. For every 100 females there are 90.1 males.

24.6K
Total Population
1,572
Density (mi²)
-167 -0.67%
Growth

Alton Population

Alton Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202624,632-167-0.67%
202524,799-168-0.67%
202424,967-127-0.51%
202325,094-156-0.62%
202225,250-204-0.8%
202125,454-182-0.71%
202025,636-50-0.19%
201926,262-245-0.92%
201826,507-223-0.83%
201726,730-145-0.54%
201626,875-136-0.5%
201527,011-193-0.71%
201427,204-186-0.68%
201327,390-124-0.45%
201227,514-194-0.7%
201127,708-193-0.69%
201027,901360.13%
200030,496-2,409-7.32%
199032,905-1,266-3.7%
198034,171-5,529-13.93%
197039,700-3,347-7.78%
196043,04710,49732.25%
195032,5501,2954.14%
194031,2551,1043.66%
193030,1515,46922.16%
192024,6827,15440.81%
191017,5283,31823.35%
190014,2103,91638.04%
189010,2941,31914.7%
18808,9753103.58%
18708,6652,33336.84%
18606,3322,74776.62%
18503,58500%

Median Age

Overall: 38 years
Female: 39 years
Male: 36.9 years

Alton Adults

There are 19,440 adults, (4,354 of whom are seniors) in Alton.

Sex Ratio

Female: 13,300 (52.6%)
Male: 11,979 (47.4%)

Demographics

The racial composition of Alton includes 69.93% White, 19.46% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White17,67869.93%
Black or African American4,92019.46%
Two or more races1,8987.51%
Asian3641.44%
Other race3121.23%
Native American1070.42%
Race
Population ↓
Percentage (of total)
White3011.19%
Two or more races2080.82%
Other race1650.65%
Black or African American780.31%
Native American80.03%
Race
Population ↓
Percentage (of total)
White17,37768.74%
Black or African American4,84219.15%
Two or more races1,6906.69%
Asian3641.44%
Other race1470.58%
Native American990.39%

Alton Marital Status

Economics and Income Statistics

Alton 's average per capita income is $40,096. Household income levels show a median of $54,568. The poverty rate stands at 21.03%.

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$84,960-
Families$71,813$79,674
Households$54,568$67,596
Non Families$33,856$49,945

$40,096

Average Income

$54,568

Median Household Income

21.03%

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)