Lakes / Illinois / Randolph County / Baldwin Lake
Baldwin Lake, Illinois
1,874.85 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.22 degrees N, 89.87 degrees W - Randolph 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 Baldwin Lake Stacks Up
- Larger than 95% of the 511 lakes counted in Illinois.
- The largest lake in Randolph County among those counted.
- About 49 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Round Pond | St. Clair | 3.2 mi | 51.65 acres |
| Brush Lake | St. Clair | 7.5 mi | 37.31 acres |
| Biebell Lake | St. Clair | 11 mi | 26.93 acres |
| New City Reservoir | Randolph | 11 mi | 45.47 acres |
| Old City Reservoir | Randolph | 12 mi | 26.09 acres |
| City Reservoir | Randolph | 13 mi | 33.36 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Baldwin Lake
How Big Is Baldwin Lake?
Baldwin Lake covers 1,874.85 acres in Randolph County, Illinois.
What Is the Largest Lake in Randolph County?
Baldwin Lake is the largest lake in Randolph County, at 1,874.85 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 98656210). Verified October 30, 2026.