Alton, Illinois
Alton is a city in Madison County, Illinois, with an estimated population of 25,006 in 2023. It sits at 38.9039, -90.1512 in the America/Chicago time zone.
| Field | Value |
|---|---|
| Place name | Alton |
| Type | city |
| State | Illinois (IL) |
| County | Madison County |
| Population (2023 est.) | 25,006 |
| Land area | 15.67 sq mi (40.59 km²) |
| Coordinates | 38.9039, -90.1512 |
| Time zone | America/Chicago |
| ZIP codes | 62002 |
ZIP codes and area codes for Alton
Alton covers 1 ZIP code: 62002. Browse all ZIP codes in Illinois for the full list.
Where is Alton?
Alton is located in Illinois, in Madison County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
East Alton 4 km · ILWest Alton 6 km · MOWood River 8 km · ILGodfrey 8 km · ILBethalto 9 km · ILHartford 11 km · ILRoxana 12 km · ILSouth Roxana 13 km · IL
Other places in Madison County
Granite City 26,908Edwardsville 26,698Collinsville 23,779Godfrey 17,597Glen Carbon 13,868Troy 11,209Wood River 10,270Highland 9,961Bethalto 9,170Maryville 8,316
Related
Frequently asked questions
What county is Alton, IL in?
Alton is in Madison County, Illinois.
What is the population of Alton, IL?
The 2023 Census Bureau estimate is 25,006.
What time zone is Alton in?
Alton is in the America/Chicago time zone.