Dupo, Illinois
Dupo | |
|---|---|
Location of Dupo in St. Clair County, Illinois. | |
| Coordinates: 38°30′47″N 90°13′36″W / 38.51306°N 90.22667°W | |
| Country | United States |
| State | Illinois |
| County | St. Clair |
| Area | |
• Total | 6.42 sq mi (16.64 km2) |
| • Land | 6.40 sq mi (16.58 km2) |
| • Water | 0.023 sq mi (0.06 km2) |
| Elevation | 410 ft (120 m) |
| Population (2020) | |
• Total | 3,996 |
| • Density | 624.1/sq mi (240.96/km2) |
| Time zone | UTC-6 (CST) |
| • Summer (DST) | UTC-5 (CDT) |
| ZIP code | 62239 |
| Area code | 618 |
| FIPS code | 17-21254 |
| GNIS ID | 2398759 |
| Website | www |
Dupo is a village in St. Clair County, Illinois, United States. As of the 2020 census, Dupo had a population of 3,996. The village was settled in about 1750 and was incorporated in 1907. Its modern name, adopted in the early 20th century, is shortened from Prairie du Pont ("Bridge Prairie").