Lakes / Illinois / Morgan County / Meredosia Lake
Meredosia Lake, Illinois
1,404.55 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.87 degrees N, 90.55 degrees W - Morgan 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 Meredosia Lake Stacks Up
- Larger than 93% of the 511 lakes counted in Illinois.
- The largest lake in Morgan County among those counted.
- About 48 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Hambaugh-Martin Number 1 Reservoir | Brown | 5.3 mi | 27.18 acres |
| Barlow Lake | Pike | 5.9 mi | 27.92 acres |
| Smith Lake | Scott | 6.4 mi | 273.79 acres |
| Big Lake | Brown | 6.4 mi | 293.56 acres |
| Curry Lake | Schuyler | 11 mi | 426.5 acres |
| McCoe Lake | Pike | 12 mi | 43.24 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Meredosia Lake
How Big Is Meredosia Lake?
Meredosia Lake covers 1,404.55 acres in Morgan County, Illinois.
What Is the Largest Lake in Morgan County?
Meredosia Lake is the largest lake in Morgan County, at 1,404.55 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 156100623). Verified October 30, 2026.