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CITY · 1990 CENSUS

Alton

Illinois · 32,905 residents · 15.7 sq mi
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The short version

Alton is home to 32,905 people in Illinois. Median home value sits at $37,500. Households here earn about 29% less than in Illinois as a whole. 12% of adults hold a bachelor's degree or higher. The poverty rate is 19.9%, above the 13.2% national rate. Renters pay $330 a month at the median.

At a glance
Lower income
below the US median
US median: $30,130
Mid-age
median age 33.6
US median: 33.0
Less educated
12% hold a bachelor's degree
US average: 20%
More affordable
home values down 11%, inflation adjusted
US median home: $93,722
Section 01

Population & growth

32,905
+8%vs 2000
vs 30,496 in 2000
1990 – 2025
33.6
−5%vs 2000
vs 35.4 in 2000
US average: 33.0
Land area
15.7 sq mi
Population, 19902024
25K27K29K31K34K19902000201020202024Alton
202425K
1990201020202024
Age distribution, 1990
Under 58.1%(2,664)
US avg: 7.3%
5 to 97.8%(2,568)
US avg: 7.3%
10 to 146.5%(2,139)
US avg: 6.9%
15 to 196.3%(2,086)
US avg: 7.1%
20 to 246.6%(2,173)
US avg: 7.5%
25 to 3417.3%(5,682)
US avg: 17.5%
35 to 4413.3%(4,383)
US avg: 15.1%
45 to 548.2%(2,698)
US avg: 10.2%
55 to 648.6%(2,843)
US avg: 8.5%
65 to 748.4%(2,757)
US avg: 7.3%
75 to 847%(2,293)
US avg: 4%
85 and over1.9%(619)
US avg: 1.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

$22,948
−3%inflation adjusted, since 2000
vs $31,213 in 2000
US average: $30,130
1990 – 2024
$10,904
−35%vs 2000
vs $16,817 in 2000
US average: $14,340
19.9%
+1.2 ptsvs 2000
vs 18.7% in 2000
US average: 13.2%
Section 03

Housing

$37,500
−11%inflation adjusted, since 2000
vs $55,400 in 2000
US average: $93,722
1990 – 2024
$330
+1%inflation adjusted, since 2000
vs $430 in 2000
US average: $450
64.8%
−0.6 ptsvs 2000
vs 65.4% in 2000
35.2% rent
Section 04

Race & ethnicity

2000
White, non-Hispanic71.6%(21,825)
Black24.6%(7,504)
Hispanic / Latino1.5%(454)
Asian0.4%(112)
Other0%
1990
White, non-Hispanic75.7%(24,912)
Black23.1%(7,587)
Hispanic / Latino1.1%(369)
Asian0.3%(99)
Other0.9%(307)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican2.4%(599)
Spaniard0.1%(26)
Chilean0.1%(22)
Asian origin
Filipino0.2%(52)
Chinese0.1%(17)
Vietnamese0.1%(17)
Pakistani0.1%(17)
Thai0%(6)
Korean0%(5)
Pacific Islander origin
Ancestry
German20.8%(5,258)
Irish14.3%(3,627)
English10.2%(2,580)
American3.7%(943)
Italian3.4%(866)
Polish2.2%(546)
Scottish1.8%(457)
French1.6%(396)
Scotch-Irish1.4%(354)
Dutch0.7%(180)
Swedish0.7%(170)
+ 28 more ancestry groups with data
Croatian0.4%(95)
Russian0.4%(92)
Nigerian0.4%(92)
Welsh0.3%(86)
Norwegian0.3%(79)
Australian0.3%(66)
Greek0.2%(60)
Czech0.2%(58)
Arab0.2%(55)
Canadian0.2%(54)
Ukrainian0.2%(53)
Hungarian0.2%(51)
West Indian0.2%(51)
British0.2%(44)
Syrian0.2%(43)
Austrian0.1%(37)
Swiss0.1%(33)
Slovak0.1%(31)
Lithuanian0.1%(15)
Macedonian0.1%(13)
Portuguese0.1%(13)
Romanian0.1%(13)
Egyptian0%(12)
Turkish0%(5)
Section 05

Education

11.6%
−4.5 ptsvs 2000
vs 16.1% in 2000
US average: 20.3%
High school or higher
72.4%
−8.8 ptsvs 2000
vs 81.2% in 2000
US average: 75.2%
3.2%
−2.0 ptsvs 2000
vs 5.2% in 2000
US average: 7.1%
Section 06

Commute & transportation

18.3 min
+11%vs 2000
vs 16.5 min in 2000
US average: 21.9
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status (2024)
Men 15+
Never married46.3%(4,351)
Married37.2%(3,500)
Widowed3.3%(306)
Divorced13.2%(1,240)
Women 15+
Never married36.7%(4,009)
Married34.8%(3,799)
Widowed9.9%(1,083)
Divorced18.6%(2,031)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

6.8%
−5.6 ptssince 2013
from 12.4% in 2013
US average: 8.4%
46.3%
Unchangedsince 2020
from 46.3% in 2020
US average: 54.8%
Direct-purchase
10.7%
−0.1 ptssince 2020
from 10.8% in 2020
US average: 13.8%
20.2%
+0.6 ptssince 2020
from 19.6% in 2020
US average: 18.4%
34.5%
−0.2 ptssince 2020
from 34.7% in 2020
US average: 20.9%
VA health care
2.4%
+0.4 ptssince 2020
from 2.0% in 2020
US average: 2.2%
Any private
55.6%
Unchangedsince 2020
from 55.6% in 2020
US average: 67.1%
Any public
49.8%
−0.7 ptssince 2020
from 50.5% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)19.2%(308)
US avg: 26.4%
Gulf War (1990s)25.7%(413)
US avg: 24.3%
Vietnam era31.3%(503)
US avg: 33.1%
Korean War2.6%(41)
US avg: 4.5%
World War II0%(0)
US avg: 1%

Share of the 1,606 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
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Frequently asked

How many people live in Alton, Illinois?

Alton, Illinois has about 32,905 residents according to the 1990 Census.

What is the median household income in Alton, Illinois?

The typical household in Alton, Illinois earns about $22,948 a year. Half of households make more than that, and half make less.

Is Alton, Illinois expensive?

In Alton, Illinois, the median home is worth about $37,500, and the typical rent is about $330 a month.

How educated are people in Alton, Illinois?

About 11.6% of adults age 25 and over in Alton, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Alton, Illinois?

About 19.9% of people in Alton, Illinois live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →