Alton, Illinois Population 2021

25,690
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Alton is a city located in Madison County Illinois. With a 2020 population of 25,690, it is the 88th largest city in Illinois and the 1507th largest city in the United States . Alton is currently declining at a rate of -1.00% annually and its population has decreased by -7.81% since the most recent census, which recorded a population of 27,865 in 2010. Alton reached it's highest population of 43,047 in 1960. Spanning over 17 miles, Alton has a population density of 1,658 people per square mile.

The average household income in Alton is $53,625 with a poverty rate of 26.60%. The median rental costs in recent years comes to $773 per month, and the median house value is $79,900. The median age in Alton is 38.8 years, 35.5 years for males, and 41.5 years for females.

Alton Demographics

According to the most recent ACS, the racial composition of Alton was:

  • White: 69.99%
  • Black or African American: 24.89%
  • Two or more races: 4.46%
  • Asian: 0.38%
  • Other race: 0.15%
  • Native American: 0.12%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Alton, Illinois is 25,690 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 26,467.The last official US Census in 2010 recorded the population at 27,865.

Alton, Illinois Population 2021

Population by Race

Race Population Percentage
White18,64669.99%
Black or African American6,63124.89%
Two or More Races1,1874.46%
Asian1020.38%
Some Other Race410.15%
American Indian and Alaska Native330.12%
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Alton Population by Race

Alton Population Pyramid $2021

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Alton Median Age

38.8


Total

35.5


Male

41.5


Female

Alton Adults

There are 20,422 adults, (4,311 of whom are seniors) in Alton.

Alton Age Dependency

65.4

Age Dependency Ratio

26.8

Old Age Dependency Ratio

38.6

Child Dependency Ratio

Alton Sex Ratio

Female

13,853

52.00%

Male

12,787

48.00%

Alton Population by Age

Alton Renter vs Owner Occupied by Household Type

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Alton Household Types

Type Owner Renter
Married81.6%18.4%
All59.6%40.4%
Non Family54.3%45.7%
Male45.4%54.6%
Female40.1%59.9%

59.6%

Rate of Home Ownership

Alton Households and Families

Type Count Average Size Owned
All11,5322.2659.6
Non Family5,3641.2354.3
Married3,5213.0481.6
Female2,1273.3840.1
Male5203.0745.4

3.03

Average Family Size

2.26

Average Household Size

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Alton Households by Type

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Education Attained Count Percentage
Less Than 9th Grade6423.46%
9th to 12th Grade1,5838.52%
High School Graduate5,75130.95%
Some College5,24428.22%
Associates Degree1,90010.23%
Bachelors Degree2,09511.27%
Graduate Degree1,3667.35%
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Alton Educational Attainment by Sex (over 25)

Alton Educational Attainment by Race

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Race Total High School Bachelors
White13,98012,5743,066
Black3,8743,144313
2+ Races37837110
Hispanic27819656
Asian747426
Native American3333
Other Race2222

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 35.14%.

Alton Educational Attainment by Race

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Name Average Male Female
Overall$30,987$38,617$25,806
Less Than 9th Grade$15,333$19,375$14,067
High School Graduate$27,356$35,300$21,378
Some College$29,732$36,238$25,884
Bachelors Degree$48,300$53,621$43,148
Graduate Degree$60,139$83,646$55,189

$30,987

Average Earnings

$38,617

Average Male

$25,806

Average Female

Alton Earnings by Educational Attainment

Alton Language by Age

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Alton Language

97.47% of Alton residents speak only English, while 2.53% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.08% of the population.

Alton Language

Alton Poverty by Race

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Name Total In Poverty Poverty Rate
White17,9183,53419.72%
Black6,5392,95445.18%
Multiple1,16432928.26%
Hispanic38614136.53%
Native33824.24%
Asian10243.92%

26.60%

Overall Poverty Rate

25.54%

Male Poverty Rate

27.59%

Female Poverty Rate

Poverty in Alton

The race most likely to be in poverty in Alton is Black, with 45.18% below the poverty level.

The race least likely to be in poverty in Alton is Asian, with 3.92% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 5.38%. Among those working part-time, it was 30.11%, and for those that did not work, the poverty rate was 36.37%.

Alton Poverty

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Name Poverty
Less Than 9th Grade57.14%
Some College18.64%
High School18.57%
Bachelors or Greater10.51%

Alton Poverty Rate by Education

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Rate Poverty
Female Unemployed66.03%
Male Unemployed52.47%
Female Employed17.61%
Male Employed8.52%

Alton Poverty Rate by Employment Status and Sex

Alton Income by Household Type

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Name Median Mean
Households$40,211$53,625
Families$49,609$66,096
Married Families$75,266-
Non Families$29,185$37,119
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Income by Household Type

Alton Marital Status

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Marriage Rates

35.5%

Overall Marriage Rate

37.3%

Male Marriage Rate

33.8%

Female Marriage Rate

Alton Married by Age and Sex

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Alton Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Alton Marital Status by Race

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Alton Marital Status

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1,803

Number of Veterans

1,696

Male Veterans

107

Female Veterans

War Veterans
Vietnam662
First Gulf War292
Second Gulf War243
Korea127
World War II28

Alton Veterans by War

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Age Group Veterans
65 to 74541
35 to 54462
75+360
55 to 64290
18 to 34150

Alton Veterans by Age

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Name Veterans % of Total
White1,5189.84%
Black2646.02%
Hispanic3811.21%
2+ Races214.76%

Alton Veterans by Race

Alton Veterans by Education

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9.18%

Veteran Poverty Rate

36.54%

Veteran Disability Rate

Alton Veterans by Education

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61.5%

Labor Force Participation

55.7%

Employment Rate

9.2%

Unemployment Rate

Alton Employment by Age

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Alton Employment by Race

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Alton Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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73.93%

Born in Alton

98.48%

Native Born

1.52%

Foreign Born

0.70%

Non Citizen

0.81%

Naturalized

Place of Birth

98.48% of Alton residents were born in the United States, with 73.93% having been born in Illinois. 0.70% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Alton Place of Birth

Year Population Growth Annual Growth Rate
202125,690-259-1.00%
202025,949-259-0.99%
201926,208-259-0.98%
201826,467-240-0.90%
201726,707-158-0.59%
201626,865-136-0.50%
201527,001-193-0.71%
201427,194-186-0.68%
201327,380-125-0.45%
201227,505-197-0.71%
201127,702-196-0.70%
201027,898-2,598-0.89%
200030,496-2,409-0.76%
199032,905-1,266-0.38%
198034,171-5,529-1.49%
197039,700-3,347-0.81%
196043,04710,4972.83%
195032,5501,2950.41%
194031,2551,1040.36%
193030,1515,4692.02%
192024,6827,1543.48%
191017,5283,3182.12%
190014,2103,9163.28%
189010,2941,3191.38%
18808,9753100.35%
18708,6652,3333.19%
18606,3322,7475.85%
18503,5850.00%

Alton Population by Year