Lakes / Illinois / Hancock County / Carthage Lake
Carthage Lake, Hancock County, Illinois
42.5 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
40.43 degrees N, 91.15 degrees W - Hancock 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 Carthage Lake Stacks Up
- Larger than 30% of the 511 lakes counted in Illinois.
- About 84 miles from Peoria, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Linda Lake | Hancock | 6.6 mi | 39.54 acres |
| Colmar Lake | McDonough | 16 mi | 25.2 acres |
| Augusta Lake | Hancock | 17 mi | 26.69 acres |
| Little Rocky Run Lake | Hancock | 17 mi | 26.27 acres |
| Rocky Run Lake | Hancock | 17 mi | 43.74 acres |
| Jennifer Creek Reservoir | Hancock | 18 mi | 26.42 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Carthage Lake
How Big Is Carthage Lake?
Carthage Lake covers 42.5 acres in Hancock County, Illinois.
What Is the Largest Lake in Hancock County?
Rocky Run Lake is the largest lake in Hancock County, at 43.74 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 154231995). Verified October 30, 2026.