Lakes / Illinois / Jefferson County / Raw Water Reservoir
Raw Water Reservoir, Illinois
87.97 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.15 degrees N, 89.03 degrees W - Jefferson 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 Raw Water Reservoir Stacks Up
- Larger than 57% of the 511 lakes counted in Illinois.
- About 31 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| East Lake Impoundment | Jefferson | 3.2 mi | 45.22 acres |
| Mine Number 21 Reservoir | Franklin | 4.7 mi | 17,062.04 acres |
| Sesser Lake | Franklin | 5.5 mi | 42.26 acres |
| Valier Lake | Franklin | 7.4 mi | 57.32 acres |
| Lake Benton | Franklin | 9.1 mi | 44.48 acres |
| Lake Hamilton | Franklin | 9.6 mi | 33.11 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Raw Water Reservoir
How Big Is Raw Water Reservoir?
Raw Water Reservoir covers 87.97 acres in Jefferson County, Illinois.
What Is the Largest Lake in Jefferson County?
Lake Jaycee is the largest lake in Jefferson County, at 98.35 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 48778542). Verified October 30, 2026.