Alton, IL ZIP Codes, Coordinates & Counties
Alton, Illinois has 1 ZIP code in Madison county. The approximate center of Alton is 38.94, -90.128. Alton has about 149,530 known street addresses.
ZIP codes in Alton, IL
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 62002 | Madison | 38.94 | -90.128 |
Counties Alton spans
Madison
Most common streets in Alton
Broadway, State, Main, Washington, Brown, College, Henry, Belle, Central, Seminary
Frequently asked questions
What ZIP codes are in Alton, IL?
Alton, Illinois has 1 ZIP code, ranging from 62002 to 62002. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Alton, IL in?
Alton is in Madison county.
What are the latitude and longitude of Alton, IL?
The approximate center of Alton, Illinois is latitude 38.94, longitude -90.128. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Alton, IL have?
Alton has 1 ZIP code.
How many addresses are in Alton, IL?
Alton, Illinois has about 149,530 known street addresses in the sthan.io US address database.
What are the most common streets in Alton, IL?
Some of the most common street names in Alton are Broadway, State, Main, Washington, Brown, College.
What cities are near Alton, IL?
Cities near Alton include Cottage Hills (3 mi), Bethalto (5 mi), East Alton (5 mi), Godfrey (6 mi), Wood River (6 mi).
Cities near Alton
Cottage Hills, IL (3 mi) Bethalto, IL (5 mi) East Alton, IL (5 mi) Godfrey, IL (6 mi) Wood River, IL (6 mi) West Alton, MO (7 mi) Brighton, IL (7 mi) Roxana, IL (8 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database