Lakes / Illinois / Henry County / Shadow Lake
Shadow Lake, Illinois
88.22 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
41.54 degrees N, 90.18 degrees W - Henry 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 Shadow Lake Stacks Up
- Larger than 57% of the 511 lakes counted in Illinois.
- The largest lake in Henry County among those counted.
- About 66 miles from Peoria, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Erie | Whiteside | 10 mi | 31.88 acres |
| Bowles Slough | Rock Island | 14 mi | 37.56 acres |
| Johnson Lake | Henry | 21 mi | 55.85 acres |
| Karl Lake | Mercer | 23 mi | 29.41 acres |
| Lake Carlton | Whiteside | 23 mi | 72.4 acres |
| Frye Lake | Mercer | 23 mi | 118.86 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 145608961). Verified October 30, 2026.