Lakes / Illinois / Montgomery County / Lake Lou Yaeger
Lake Lou Yaeger, Illinois
1,369.33 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.23 degrees N, 89.60 degrees W - Montgomery 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 Lake Lou Yaeger Stacks Up
- Larger than 93% of the 511 lakes counted in Illinois.
- The largest lake in Montgomery County among those counted.
- About 38 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Fivemile Lake | Montgomery | 3.7 mi | 71.41 acres |
| Walton Lake | Montgomery | 5.8 mi | 29.16 acres |
| Lake Glenn Shoals | Montgomery | 7.3 mi | 1,097.06 acres |
| Lake Hillsboro | Montgomery | 7.8 mi | 105.51 acres |
| Mount Olive Lake | Macoupin | 12 mi | 39.54 acres |
| Old Mount Olive Reservoir | Macoupin | 12 mi | 35.34 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Lou Yaeger
How Big Is Lake Lou Yaeger?
Lake Lou Yaeger covers 1,369.33 acres in Montgomery County, Illinois.
What Is the Largest Lake in Montgomery County?
Lake Lou Yaeger is the largest lake in Montgomery County, at 1,369.33 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 149994176). Verified October 30, 2026.