Lakes / Illinois / Clay County / Greendale Lake
Greendale Lake, Illinois
43.49 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.66 degrees N, 88.69 degrees W - Clay 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 Greendale Lake Stacks Up
- Larger than 31% of the 511 lakes counted in Illinois.
- About 70 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Forbes Lake | Marion | 6.1 mi | 523.37 acres |
| Sam Dale Lake | Wayne | 9.9 mi | 209.79 acres |
| C and EI Reservoir | Marion | 13 mi | 45.96 acres |
| Salem Reservoir | Marion | 14 mi | 65.48 acres |
| Patterson Lake | Clay | 15 mi | 28.91 acres |
| Lake Centralia | Marion | 18 mi | 249.58 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Greendale Lake
How Big Is Greendale Lake?
Greendale Lake covers 43.49 acres in Clay County, Illinois.
What Is the Largest Lake in Clay County?
Salt Pond is the largest lake in Clay County, at 56.46 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 149783624). Verified October 30, 2026.