| Place Name | Dupo |
| Place Type | Village |
| ZIP Code(s) | 62239 |
| County | Saint Clair County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 4,091 |
| Population Growth Rate (2010-19) | -3.43% |
| Majority Ethnicity | White 95.03% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 12th |
| State House Districts | 116 |
| State Senate Districts | 58 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.03% |
| African American | 4.59% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.38% |