Alton ZIP Codes — Madison County, IL

There is one unique ZIP code in Alton, Illinois and it is 62002. Area code: 618.

ZIP codes

41.28

sq mi land

2.12

sq mi water

618

area code

Alton, IL ZIP code map

About Alton, IL

Alton is a charming city located in Illinois, known for its rich history and cultural significance. Situated along the Mississippi River, Alton offers a picturesque setting and a strong sense of community. The city, encompassed by the larger Madison County, boasts a unique blend of small-town charm and urban amenities.

Location & geography

Alton, Illinois, is located in Madison County, sitting just north of the confluence of the Mississippi and Illinois Rivers. Nearby cities include Godfrey, approximately 6 miles to the northwest, Wood River, around 8 miles to the southeast, and East Alton, about 6 miles to the east. The terrain of Alton comprises 41.28 square miles of land and about 2.12 square miles of water, contributing to its scenic beauty.

Community & economy

The character of Alton is deeply rooted in its historical significance and vibrant community life. Industry plays an essential role in the local economy, with sectors such as healthcare and manufacturing being prominent. Daily life in Alton is enriched by local events, parks, and cultural activities that bring residents together.

Transportation

Transportation in Alton is facilitated by major roadways including Illinois Route 143 and U.S. Route 67, which provide access to neighboring areas. The nearest major airport is St. Louis Lambert International Airport, located approximately 30 miles away. Public transit options are available within the city to accommodate residents and visitors.

History

Alton was founded in the early 19th century and became a significant river port city due to its strategic location. Historically, Alton played a key role during the abolitionist movement, notably when it was home to the Alton Civil War Prison. The city’s past is marked by its vibrant cultural heritage and memories of key historical events.

Did you know?

Alton is known for being one of the first stopover points for steamboats navigating up and down the Mississippi River. A little-known fact is that it is also reputedly one of the most haunted cities in America, with numerous legends and ghost tours that attract thrill-seekers.

ZIP codes for Alton, IL (1)

ZIP code	City	County	Map
62002	Alton	Madison	View map

Demographics & statistics

30,166

Population

41.4

Median age

$55,041

Median household income

$32,170

Per capita income

$108,100

Median home value

$910

Median monthly rent

63.8%

Home ownership

20.0%

Poverty rate

6.0%

Unemployment

10,138

Housing units

22.4%

Bachelor's or higher

Age distribution

Male Female

731

Under 5

780

1,044

5–9

1,112

894

10–14

954

877

15–19

935

550

20–24

587

1,996

25–34

2,127

1,841

35–44

1,962

1,731

45–54

1,846

1,013

55–59

1,080

60–64

1,152

1,717

65–74

1,830

795

75–84

848

331

85+

353

← Male

Female →

Age summary

Group	Count	%
Under 18	6,472	21.5%
18 and over	23,694	78.5%
65 and over	5,874	19.5%
Median age	41.4 years

Race & ethnicity

White 71.2%

Black or African American 19.6%

Two or more races 6%

Hispanic or Latino 1.5%

Asian 0.9%

Other race 0.6%

American Indian / Alaska Native 0.2%

Group	Count	%
White	21,817	71.2%
Black or African American	6,003	19.6%
Two or more races	1,840	6%
Hispanic or Latino	464	1.5%
Asian	274	0.9%
Other race	185	0.6%
American Indian / Alaska Native	47	0.2%

Household income

Under $10k 7.9%

$10k–$15k 4.5%

$15k–$25k 9.3%

$25k–$35k 11.4%

$35k–$50k 12.2%

$50k–$75k 18.3%

$75k–$100k 13.1%

$100k–$150k 13.2%

$150k–$200k 5.4%

$200k+ 4.6%

Range	% of households
Under $10k	7.9%
$10k–$15k	4.5%
$15k–$25k	9.3%
$25k–$35k	11.4%
$35k–$50k	12.2%
$50k–$75k	18.3%
$75k–$100k	13.1%
$100k–$150k	13.2%
$150k–$200k	5.4%
$200k+	4.6%
Median income	$55,041

Housing

Home values

Under $50k 12.2%

$50k–$100k 33.4%

$100k–$150k 23.0%

$150k–$200k 11.8%

$200k–$300k 11.4%

$300k–$500k 6.1%

$500k–$1M 2.2%

Housing overview

Metric	Value
Median home value	$108,100
Median rent / month	$910
Owner occupied	63.8%
Renter occupied	36.2%
Vacant	12.2%
Single-family detached	80.1%
Large apartment buildings	4.4%
Mobile homes	1.1%
Median rooms	5.5
Avg household size (owned)	2.23

Year built

Era	%
2020 or later	0.1%
2010–2019	1.1%
2000–2009	6.2%
1990–1999	5.2%
1980–1989	5.1%
1970–1979	11.4%
1960–1969	9.8%
1950–1959	20.2%
1940–1949	15.9%
1939 or earlier	24.9%

Bedrooms

Size	% of units
No bedroom (studio)	2.4%
1 bedroom	11.1%
2 bedrooms	35.6%
3 bedrooms	36.2%
4 bedrooms	11.3%
5+ bedrooms	3.3%

Vehicles per household

Vehicles	% of households
No vehicle	8.7%
1 vehicle	41.4%
2 vehicles	34.7%
3 or more	15.2%

Heating fuel

Fuel type	%
Utility gas	58.6%
Electricity	35.6%
Propane / LP gas	4.3%
Fuel oil	0.2%
Wood	0.4%
Solar	0.1%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	4,420	33.9%
Cohabiting couple	1,205	9.2%
Male householder, no spouse	3,058	23.4%
Female householder, no spouse	4,359	33.4%
Households with children under 18	3,401	26.1%
Households with seniors (65+)	4,410	33.8%
Average household size	2.28

Marital status

Status	Male	Female
Never married	39.8%	30.4%
Married	40.8%	36.0%
Separated	1.4%	2.7%
Widowed	2.9%	11.8%
Divorced	15.2%	19.1%

Education

Less than 9th grade 2.0%

Some HS, no diploma 7.2%

HS graduate 29.5%

Some college, no degree 28.2%

Associate's degree 10.8%

Bachelor's degree 14.6%

Graduate / professional 7.8%

Metric	%
HS diploma or higher	90.8%
Bachelor's or higher	22.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	524	7.9%
Kindergarten	427	6.4%
Elementary school	3,080	46.1%
High school	1,334	20.0%
College / grad school	1,309	19.6%

Employment

Industry of employment

Education & healthcare 23.9%

Retail trade 13.2%

Arts, food & hospitality 12.1%

Professional & management 10.7%

Manufacturing 10.0%

Transportation & utilities 7.8%

Other services 4.9%

Construction 4.7%

Finance & real estate 4.3%

Public administration 4.0%

Wholesale trade 2.3%

Agriculture & mining 1.2%

Information 1.0%

Occupation

Category	%
Management, business & arts	34.5%
Service	23.4%
Sales & office	18.8%
Natural resources & construction	8.2%
Production & transportation	15.1%

Employment type

Type	%
Private sector	83.7%
Government	11.1%
Self-employed	5.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.3%
Carpool	9.3%
Public transit	1.3%
Walk	2.0%
Other means	1.7%
Avg commute (minutes)	23.6

Poverty

All people 20.0%

Under 18 years 28.3%

18 and over 17.9%

Married-couple families 6.3%

Female-led households 28.8%

Income support

Source	% of households
Social Security	36.7%
Retirement income	25.8%
Supplemental Security	8.5%
Cash public assistance	2.9%
Food stamps / SNAP	21.3%

Health indicators

Condition	%
High blood pressure	37.0%
High cholesterol	33.5%
Heart disease	7.2%
Stroke	3.8%
Asthma	11.1%
Arthritis	29.0%
Kidney disease	3.4%
Pulmonary disease	8.5%
Cancer	6.7%

Behavior / access	%
Binge drinking	14.2%
No physical activity	28.4%
Less than 7 hrs sleep	35.6%
Fair or poor health	18.1%
Poor mental health	14.2%
Poor physical health	11.7%
No health insurance	12.2%
Visited doctor (checkup)	78.2%
Visited dentist	60.8%
Cholesterol screening	88.5%
Teeth loss	18.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,466	10.4%

Disability	%
Any disability	21.3%
Under 18	9.5%
18–64 years	18.9%
65 and over	42.0%

Health insurance coverage

Type	%
Private insurance	58.9%
Public insurance	49.0%
Uninsured under 19	2.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	28,655	95.0%
Spanish	358	1.2%
Other Indo-European	146	0.5%
Asian & Pacific Islander	132	0.5%
Other languages	41	0.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	29,586	98.1%
Born in same state	29,427	97.6%
Born in different state	21,798	72.3%
Foreign born	159	0.5%
Naturalized citizen	580	1.9%
Not a US citizen	362	62.4%

Ancestry

Ancestry	Count	%
Italian	3,850	12.8%
French	3,001	9.9%
Arab	1,526	5.1%
English	302	1%
Polish	190	0.6%

Ancestry	Count	%
German	73	0.2%
Irish	48	0.2%
Dutch	41	0.1%
Norwegian	8	0%

Technology access

Metric	% of households
Computer access	43.2%
Internet access	90.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Alton, IL have?

Alton, IL has one ZIP code: 62002. Each ZIP code serves a distinct delivery area within the city and surrounding region.