Lakes / Illinois / Clark County / Mill Creek Watershed Impoundment Reservoir
Mill Creek Watershed Impoundment Reservoir, Clark County, Illinois
56.44 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.34 degrees N, 87.76 degrees W - Clark 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 Mill Creek Watershed Impoundment Reservoir Stacks Up
- Larger than 41% of the 511 lakes counted in Illinois.
- About 105 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Mill Creek Watershed Impoundment Reservoir | Clark | 1.1 mi | 51.34 acres |
| Lincoln Trail State Park Lake | Clark | 2.1 mi | 143.57 acres |
| Twin Lakes | Edgar | 21 mi | 163.09 acres |
| Lake Charleston | Coles | 22 mi | 335.57 acres |
| Brooks Lake | Crawford | 26 mi | 54.61 acres |
| Lake Oakland | Coles | 26 mi | 32.87 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mill Creek Watershed Impoundment Reservoir
How Big Is Mill Creek Watershed Impoundment Reservoir?
Mill Creek Watershed Impoundment Reservoir covers 56.44 acres in Clark County, Illinois.
What Is the Largest Lake in Clark County?
Lincoln Trail State Park Lake is the largest lake in Clark County, at 143.57 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 155469990). Verified October 30, 2026.