| Place Name | Alton |
| Place Type | City |
| ZIP Code(s) | 62002 |
| County | Madison County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 27,868 |
| Population Growth Rate (2010-19) | -7.86% |
| Majority Ethnicity | White 71.09% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 12thIllinois 13th |
| State House Districts | 111 |
| State Senate Districts | 56 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 71.09% |
| African American | 26.18% |
| Hispanic | 0.2% |
| Asian | 0.59% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.93% |