Lakes / Illinois / McHenry County / McCullom Lake
McCullom Lake, Illinois
241.92 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
42.36 degrees N, 88.29 degrees W - McHenry 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 McCullom Lake Stacks Up
- Larger than 79% of the 511 lakes counted in Illinois.
- About 41 miles from Rockford, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Wonder Lake | McHenry | 3.7 mi | 697.58 acres |
| Defiance Lake | McHenry | 4.4 mi | 66.22 acres |
| Wold Lake | McHenry | 4.5 mi | 65.24 acres |
| Lily Lake | McHenry | 4.8 mi | 95.88 acres |
| Pistakee Lake | McHenry | 5.0 mi | 1,743.58 acres |
| Sullivan Lake | Lake | 5.3 mi | 57.33 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About McCullom Lake
How Big Is McCullom Lake?
McCullom Lake covers 241.92 acres in McHenry County, Illinois.
What Is the Largest Lake in McHenry County?
Pistakee Lake is the largest lake in McHenry County, at 1,743.58 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 121625377). Verified October 30, 2026.