Lakes / Illinois / Warren County / Little Swan Lake
Little Swan Lake, Illinois
228.33 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
40.67 degrees N, 90.54 degrees W - Warren 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 Little Swan Lake Stacks Up
- Larger than 78% of the 511 lakes counted in Illinois.
- The largest lake in Warren County among those counted.
- About 50 miles from Peoria, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Wildwood Haven | Fulton | 11 mi | 97.85 acres |
| Spring Lake | McDonough | 15 mi | 251.55 acres |
| Lake Bracken | Knox | 17 mi | 142.09 acres |
| Citizens Lake | Warren | 18 mi | 25.45 acres |
| Argyle Lake | McDonough | 20 mi | 92.91 acres |
| Lake Wee-Ma-Tuk | Fulton | 22 mi | 124.54 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Little Swan Lake
How Big Is Little Swan Lake?
Little Swan Lake covers 228.33 acres in Warren County, Illinois.
What Is the Largest Lake in Warren County?
Little Swan Lake is the largest lake in Warren County, at 228.33 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 154350201). Verified October 30, 2026.