Lakes / Illinois / Jersey County / Long Lake
Long Lake, Jersey County, Illinois
67.95 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.95 degrees N, 90.41 degrees W - Jersey 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 Long Lake Stacks Up
- Larger than 49% of the 511 lakes counted in Illinois.
- About 70 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Luesse Lake | Jersey | 2.2 mi | 76.11 acres |
| Chickahominy Lake | Calhoun | 3.5 mi | 50.22 acres |
| Silver Lake | Calhoun | 3.9 mi | 270.83 acres |
| Royal Lake | Calhoun | 4.9 mi | 86.49 acres |
| Gilbert Lake | Calhoun | 5.4 mi | 220.67 acres |
| Lower Stump Lake | Calhoun | 7.6 mi | 182.12 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Long Lake
How Big Is Long Lake?
Long Lake covers 67.95 acres in Jersey County, Illinois.
What Is the Largest Lake in Jersey County?
Upper Stump Lake is the largest lake in Jersey County, at 840.65 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 42877148). Verified October 30, 2026.