| Carlyle Lake | |
|---|---|
 Carlyle Lake over the Coles Creek Recreation Area | |
  Carlyle Lake  Carlyle Lake | |
| Location | Clinton / Fayette / Bond counties, Illinois, U.S. |
| Coordinates | 38°37′8.18″N 89°21′10.28″W / 38.6189389°N 89.3528556°W (Dam) |
| Type | Reservoir |
| Primary inflows | Kaskaskia River, North Fork |
| Primary outflows | Kaskaskia River |
| Basin countries | United States |
| Max. length | 15 miles (24.1 km) |
| Max. width | 3.5 miles (5.6 km) |
| Surface area | 26,000 acres (105.2 km2) |
| Average depth | 11 feet (3.4 m) |
| Max. depth | 35 feet (10.7 m) |
| Shore length1 | 85 miles (136.8 km) |
| Surface elevation | 445 feet (135.6 m) |
| Settlements | Carlyle, Keyesport |
| 1 Shore length is not a well-defined measure. | |
Carlyle Lake is a 25,000-acre (101.2 km2) reservoir largely located in Clinton County, Illinois, United States, with smaller portions of the lake within Bond and Fayette counties. It is the largest man-made lake in Illinois, and the largest lake wholly contained within the state.