Alton demographics profile

Population density (sq mi)1,75722291
Median age37.537.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)45%55%55%
Families w/ Kids under 1844%44%43%
Speak English98%77%79%
Speak Spanish1%13%13%
Alton, IL has a population of 27,175 and is the 1,592nd largest city in the United States. The population density is 1,757 per sq mi which is 690% higher than the Illinois average and 1839% higher than the national average. The median age in Alton is 38 which is approximately equal to the Illinois average of 37. In Alton, 45% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 74% of Alton residents were born in Illinois, 24% were born out of state, 1% were born outside of the United States and 1% were foreign born.
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Did you know?

  • The population density in Alton is 690% higher than Illinois.
  • The median age in Alton is equal to Illinois.
  • In Alton 68.63% of the population is White.
  • In Alton 26.87% of the population is Black or African American.
  • In Alton 0.32% of the population is Asian.

Compare Alton, IL Demographics To Other Cities

Alton population breakdown by race

Black or African American26.87%14.30%12.63%
American Indian0.31%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race3.73%2.34%3.06%
Other race0.15%5.86%4.75%
In Alton, 2.4% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Alton age breakdown

Marital status

Age of children in married couples

Source: The Alton, IL demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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