Lakes / Illinois / Sangamon County / Sudduth Lake
Sudduth Lake, Illinois
36.82 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.72 degrees N, 89.82 degrees W - Sangamon 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 Sudduth Lake Stacks Up
- Larger than 23% of the 511 lakes counted in Illinois.
- About 10 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Springfield | Sangamon | 11 mi | 3,899.08 acres |
| Waverly City Lake | Morgan | 13 mi | 60.95 acres |
| Clear Lake | Sangamon | 17 mi | 136.4 acres |
| Lake Petersburg | Menard | 19 mi | 177.42 acres |
| Sunset Lake | Macoupin | 19 mi | 123.31 acres |
| Sangchris Lake | Christian | 20 mi | 2,260.03 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Sudduth Lake
How Big Is Sudduth Lake?
Sudduth Lake covers 36.82 acres in Sangamon County, Illinois.
What Is the Largest Lake in Sangamon County?
Lake Springfield is the largest lake in Sangamon County, at 3,899.08 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 131464076). Verified October 30, 2026.