Lakes / Illinois / Brown County / Big Lake
Big Lake, Brown County, Illinois
293.56 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.96 degrees N, 90.52 degrees W - Brown 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 Big Lake Stacks Up
- Larger than 82% of the 511 lakes counted in Illinois.
- The largest lake in Brown County among those counted.
- About 48 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Curry Lake | Schuyler | 4.8 mi | 426.5 acres |
| Meredosia Lake | Morgan | 6.4 mi | 1,404.55 acres |
| Meyers Pond | Cass | 6.9 mi | 147.03 acres |
| Schuy-Rush Lake | Schuyler | 8.0 mi | 251.55 acres |
| Little Lake | Schuyler | 9.7 mi | 171.49 acres |
| Treadway Lake | Cass | 9.8 mi | 1,477.8 acres |
Straight-line distance between lake centers.
Facts and Figures
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 156098926). Verified October 30, 2026.