Lakes / Illinois / Union County / Dongola Lake
Dongola Lake, Illinois
63.51 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
37.36 degrees N, 89.18 degrees W - Union 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 Dongola Lake Stacks Up
- Larger than 45% of the 511 lakes counted in Illinois.
- The largest lake in Union County among those counted.
- About 25 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bluff Lake | Union | 9.8 mi | 61.53 acres |
| Anna State Hospital Reservoir | Union | 10.0 mi | 27.68 acres |
| Tall Tree Lake | Johnson | 15 mi | 49.67 acres |
| Dutchman Lake | Johnson | 17 mi | 101.56 acres |
| Horseshoe Lake | Alexander | 18 mi | 1,784.84 acres |
| Wolf Lake | Union | 18 mi | 59.8 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Dongola Lake
How Big Is Dongola Lake?
Dongola Lake covers 63.51 acres in Union County, Illinois.
What Is the Largest Lake in Union County?
Dongola Lake is the largest lake in Union County, at 63.51 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 43334885). Verified October 30, 2026.