Lakes / Illinois / McHenry County / Lake in the Hills
Lake in the Hills, Illinois
54.36 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
42.18 degrees N, 88.32 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 Lake in the Hills Stacks Up
- Larger than 40% of the 511 lakes counted in Illinois.
- About 40 miles from Rockford, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Vulcan Lakes | McHenry | 2.5 mi | 275.77 acres |
| Crystal Lake | McHenry | 4.0 mi | 230.06 acres |
| Lake Killarney | McHenry | 5.1 mi | 59.55 acres |
| Silver Lake | McHenry | 5.7 mi | 43.74 acres |
| Spring Lake | Cook | 6.1 mi | 26.93 acres |
| Slocum Lake | Lake | 8.7 mi | 209.55 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake in the Hills
How Big Is Lake in the Hills?
Lake in the Hills covers 54.36 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 121628955). Verified October 30, 2026.