Lakes / Illinois / Hancock County
Lakes in Hancock County, Illinois
6 lakes counted in Hancock County - the largest is Rocky Run Lake at 43.74 acres.
6
Lakes Counted
43.74 acres
Largest - Rocky Run Lake
Hancock County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Rocky Run Lake | Hancock | 43.74 acres | - |
| 2 | Carthage Lake | Hancock | 42.5 acres | - |
| 3 | Linda Lake | Hancock | 39.54 acres | - |
| 4 | Augusta Lake | Hancock | 26.69 acres | - |
| 5 | Jennifer Creek Reservoir | Hancock | 26.42 acres | - |
| 6 | Little Rocky Run Lake | Hancock | 26.27 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.