Lakes / Illinois / St. Clair County / Round Pond
Round Pond, St. Clair County, Illinois
51.65 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.25 degrees N, 89.90 degrees W - St. Clair County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Round Pond Stacks Up
- Larger than 37% of the 511 lakes counted in Illinois.
- About 52 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Baldwin Lake | Randolph | 3.2 mi | 1,874.85 acres |
| Brush Lake | St. Clair | 4.7 mi | 37.31 acres |
| Biebell Lake | St. Clair | 8.9 mi | 26.93 acres |
| River King Mine Lake | St. Clair | 13 mi | 28.53 acres |
| New City Reservoir | Randolph | 14 mi | 45.47 acres |
| Waterloo New Reservoir | Monroe | 15 mi | 35.09 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Round Pond
How Big Is Round Pond?
Round Pond covers 51.65 acres in St. Clair County, Illinois.
What Is the Largest Lake in St. Clair County?
Grand Marais Lake is the largest lake in St. Clair County, at 83.23 acres.
Largest Lakes in Illinois
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Carlyle Lake | Clinton | 22,796.77 acres | - |
| 2 | Mine Number 21 Reservoir | Franklin | 17,062.04 acres | - |
| 3 | Upper Peoria Lake | Woodford | 15,460.64 acres | - |
| 4 | Lake Shelbyville | Shelby | 10,235.1 acres | - |
| 5 | Crab Orchard Lake | Williamson | 7,292.57 acres | - |
All 511 Illinois lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 98654746). Verified October 30, 2026.