Dupo
Village in St. Clair County, Illinois

Dupo is a village in St. Clair County, Illinois, with 3,996 residents (2020 Census). It sits at 410 ft (125 m) above sea level. The nearest town is East Carondelet, 1.9 miles NW.
- 3,996residents (2020 Census)
- 410 ftelevation · 125 m
- 6.2 sq miland area · 16.0 km²
- 647 / sq mipopulation density
- 62240ZIP code
About Dupo
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").
Text: Wikipedia · CC BY-SA 4.0
Dupo weather: 7-day forecast
Loading the National Weather Service forecast…
Source: National Weather Service (NOAA).
Live webcams in Dupo
Webcams: Windy.com
Living in Dupo
- Median household income
- $61,644
- Median home value
- $113,800
- Median rent
- $912/mo
- Median age
- 42.9
Do you know Dupo? Tell us about it
Help other travelers: share what makes Dupo special. We review every message before publishing it.
Map of Dupo
Tap any street on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Dupo Street View
Drag the image to look around and tap the arrows on the ground to move. If it says there is no imagery, tap a nearby street on the map above.
Open in Google Maps ›Dupo, IL population
Dupo had 3,996 residents in the 2020 Census.
| 2020 Census | 3,996 |
|---|---|
| Density | 647 per sq mi (250 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Dupo at a glance
| State | Illinois (IL) |
|---|---|
| County | St. Clair County |
| Type | Village |
| Population | 3,996 (2020) |
| Land area | 6.18 sq mi (16.0 km²) |
| Water area | 0.02 sq mi (0.06 km²) |
| Elevation | 410 ft (125 m) |
| Coordinates | 38.5161° N, 90.2176° W |
| ZIP code | 62240 |
| Census code (GEOID) | 1721254 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Dupo
- East Carondelet1.9 mi NW
- Lemay, MO3.8 mi W
- Columbia4.0 mi S
- Bella Villa, MO4.1 mi NW
- Cahokia Heights5.1 mi NE
- Mehlville, MO5.3 mi W
- St. George, MO5.3 mi W
- Wilbur Park, MO5.5 mi NW
- Sauget6.0 mi NE
- Affton, MO6.3 mi W
- Green Park, MO6.6 mi W
- Lakeshire, MO6.7 mi W
Straight-line distance between town centers.
Frequently asked questions about Dupo
What county is Dupo in?
Dupo is in St. Clair County, Illinois.
What is the population of Dupo, IL?
3,996 people lived in Dupo at the 2020 Census.
What is the ZIP code of Dupo, IL?
The ZIP code of Dupo is 62240.
What is the elevation of Dupo?
410 feet (125 m) above sea level.
What towns are near Dupo?
East Carondelet (1.9 mi), Lemay (3.8 mi), Columbia (4.0 mi), Bella Villa (4.1 mi), Cahokia Heights (5.1 mi).
Last updated: