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Alton, IL
City in Madison County, Illinois. ZIP codes: 62002, 62018.
Population
25,279
Land area
15.7sq mi
People per sq mi
1,613
ZIP codes
2
Alton and its ZIP codes
Alton at a glance
- Alton is about 7.1 times as dense as Illinois as a whole.
- It is the 87th most populous of 1,445 cities and towns in Illinois.
- Households here earn a median of $54,568 a year, 35% less than the Illinois figure of $83,390.
- A typical owner-occupied home is valued at $103,700 (61% below Illinois) and median rent is $1,015 a month.
Local data for Alton, IL
Counts from official public data
- Hospitals2
- Emergency Rooms1
- Nursing Homes3
- Schools12
- Colleges1
- Libraries3
- Banks8
- Post Offices5
- Parks19
- Grocery Stores12
- Restaurants115
- Affordable Housing10
- Home Health Agencies1
- Hospice Care1
- Dialysis Centers2
- Community Health Centers3
- Mental Health & Addiction Treatment4
- National Cemeteries2
- Private Schools4
- Community Colleges & Trade Schools1
- Toxic Release Facilities1
- Historic Places9
Housing and community stats
Alton, IL, American Community Survey 2020-2024
Median household income
$54,568
Poverty rate
21.0%
Median home value
$103,700
Median rent
$1,015/mo
Homeownership
59.9%
Bachelor's or higher
21.5%
Median age
38.0
Average commute
22.7 min
Largest reported origins and ancestries: German Americans (5,258), Irish Americans (3,627), Italian Americans (866).
Economy and federal money
Jobs, pay, income and spending are for Madison County. PPP loans are for Alton.
Unemployment rate
3.5%
Aug 2026, -0.9 pts in a year
Average annual pay
$59,911
107,517 jobs, 2025
Income per person
$62,684
BEA, 2024
Federal spending
$1.75B
FY 2026, $6,581 per person
How people get to work
Alton, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone73.8%
- Carpooled10.2%
- Public transit1.5%
- Walked2.3%
- Bicycle0.2%
- Taxi, ride-hailing, motorcycle or other2.4%
- Worked from home9.7%
Average one-way commute: 22.7 minutes for people who do not work from home.
Environment and hazard risk
Alton, IL, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Moderate
Top: heat wave
Storm events since 1996
854
Countywide, mostly thunderstorm wind
Flood insurance policies
824
0.8% of homes, county
July high / Jan low
87° / 22°F
41.9 inches of rain a year
Hazards, floods and storm historyCheck a flood zone9 historic places
Health statistics
Share of adults in Alton, IL, CDC PLACES estimates
Obesity
44.3%
U.S. 33.3% +11.0 pts
Diabetes
14.7%
U.S. 12.1% +2.6 pts
Smoking
17.8%
U.S. 12.8% +5.0 pts
Uninsured (18-64)
9.5%
U.S. 11.1% -1.6 pts
ZIP codes in Alton
2 in or overlapping Alton. Population shown
Cities near Alton
| Name | Distance | Land area (sq mi) |
|---|---|---|
| East AltonVillage | 3.1 mi | 5.3 |
| West Alton, MOCity | 4.1 mi | 28.8 |
| Rosewood HeightsCensus-designated place | 4.5 mi | 1.7 |
| GodfreyVillage | 4.6 mi | 34.4 |
| Wood RiverCity | 4.6 mi | 7 |
| BethaltoVillage | 5.6 mi | 7.6 |
| MoroCensus-designated place | 7 mi | 0.2 |
| HartfordVillage | 7.2 mi | 5.2 |
| Old Jamestown, MOCensus-designated place | 8.1 mi | 14.9 |
| Spanish Lake, MOCensus-designated place | 8.3 mi | 7.4 |
| South RoxanaVillage | 8.3 mi | 2.2 |
| RoxanaVillage | 8.3 mi | 7.1 |
| Black Jack, MOCity | 9.2 mi | 2.6 |
| BrightonVillage | 9.5 mi | 1.9 |
| Portage Des Sioux, MOCity | 10 mi | 0.6 |
| MitchellCensus-designated place | 10 mi | 0.6 |
Frequently asked questions
- What county is Alton, IL in?
- Alton is in Madison County, Illinois.
- What ZIP codes are in Alton, IL?
- ZIP codes in or overlapping Alton include 62002, 62018.
- What is the population of Alton, IL?
- About 25,279 people live in Alton, based on American Community Survey 5-year estimates.
- What cities are near Alton?
- Nearby places include East Alton (3.1 mi), West Alton, MO (4.1 mi), Rosewood Heights (4.5 mi), Godfrey (4.6 mi), Wood River (4.6 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023