Alton, IL Population

Overview

25,902

Total Population

38.1

Median age

52.18%

Female population %

91.7:100

Gender ratio (M:F)

5-9 years

Largest age group

58.5

Total dependency ratio

White

Largest racial group

481

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Alton's population is young compared to the rest of the country:

The median age in Alton is 38.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Alton's population under 18 was 24.16%, compared to the 22.51% nationwide.
Alton's elderly or the senior population (over 65 age) was 16.35% as compared to 16.04% nationwide.
Of the total population in Alton, 20.56% were under the age of 15, 16.81% aged 15 to 29, 46.27% aged 30 to 64, 14.77% aged 65 to 84, and 1.59% were 85 years of age and older.

There are 1,128 more females than males in Alton:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 52.18% females and 47.82% males in Alton, IL.
The Alton, IL gender ratio is 91.7:100 i.e. 91.7 men to 100 women (0.917).
For male population, the largest age group is 5-9 years with a population of 1,002.
For the female population, the largest age group is 30-34 years with a population of 1,048.

Alton's population has become increasingly diverse:

Racial distribution of Alton population: 68.29% are White, 25.15% are Black or African American, 0.19% are American Indian and Alaska Native, 0.57% are Asian, 0.68% are some other race and 5.12% are multiracial.
Alton's racial breakdown clearly shows that there is an absolute majority of White population in the city.
By ethnicity, 481 is Hispanic or Latino (of any race), and 25,421 (98.14% of the total population) is Non-Hispanic.
The largest racial group in Alton is White with a population of 17,688 (68.29% of the total population).

Alton's population has already reached its peak and is showing a trend of decline:

The peak population was 30,313 in the year 2000
From 2000 to 2010, Alton's population decreased by 2,412 (7.96%), as compared to the national growth of 9.63%.
From 2010 to 2020, Alton's population decreased by 2,295 (8.23%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Alton's population was lowest in year 2022 at 25,217.