Alton, IL zip code
Alton, Illinois uses one zip code: 62002. Most of it is in Madison County. Together these zip codes are home to about 30K people.
Zip codes
1
Population
30K
All zips combined
Largest zip
62002
29,543 residents
Zip codes in Alton
| Zip | Type | Population | IncomeMedian income |
|---|---|---|---|
| 62002 | 29,543 | $61,414 |