Lakes / Illinois / Johnson County
Lakes in Johnson County, Illinois
6 lakes counted in Johnson County - the largest is Lake of Egypt at 2,129.02 acres.
6
Lakes Counted
2,129.02 acres
Largest - Lake of Egypt
Johnson County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake of Egypt | Johnson | 2,129.02 acres | - |
| 2 | Dutchman Lake | Johnson | 101.56 acres | - |
| 3 | Vienna Correctional Center Lake | Johnson | 71.11 acres | - |
| 4 | Tall Tree Lake | Johnson | 49.67 acres | - |
| 5 | Vienna City Lake | Johnson | 41.02 acres | - |
| 6 | Little Cache Number 1 Reservoir | Johnson | 33.61 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.