- Location: Randolph County, Illinois
- Legal status: Village
- Population: 613 (Change since 1990: +13.5%)
- Alternate name: Prairie Du Rocher
- Latitude: 38°04'59" N (+38.0831)
- Longitude: 90°05'45" W (-90.0958)
- Elevation: 396 feet above sea level
- Precinct: Prairie du Rocher
- Land area: 0.57 square miles (364.6 acres)
As the crow flies, Prairie du Rocher is...
| Year | Population | Percent change |
|---|
| 1990 | 540 | -- |
| 2000 | 613 | +13.5% |