Lakes / Iowa / Hancock County / Crystal Lake
Crystal Lake, Hancock County, Iowa
260 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
43.23 degrees N, 93.79 degrees W - Hancock 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 Crystal Lake Stacks Up
- Larger than 77% of the 220 lakes counted in Iowa.
- About 69 miles from Okoboji, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake George | Hancock | 4.2 mi | 45 acres |
| Eagle Lake | Hancock | 7.7 mi | 434 acres |
| Darling Pool | Kossuth | 17 mi | 84 acres |
| Gabrielson Pool | Kossuth | 17 mi | 37 acres |
| Mallard Marsh Swamp | Cerro Gordo | 17 mi | 31 acres |
| Gabrielson Pool | Kossuth | 17 mi | 28 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Crystal Lake
How Big Is Crystal Lake?
Crystal Lake covers 260 acres in Hancock County, Iowa.
What Is the Largest Lake in Hancock County?
Eagle Lake is the largest lake in Hancock County, at 434 acres.
Largest Lakes in Iowa
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Rathbun Lake | Appanoose | 13,869 acres | - |
| 2 | Lake Red Rock | Marion | 8,619 acres | - |
| 3 | Spirit Lake | Dickinson | 5,463 acres | - |
| 4 | Saylorville Lake | Polk | 5,428 acres | - |
| 5 | Clear Lake | Cerro Gordo | 3,632 acres | - |
All 220 Iowa lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 155844568). Verified October 30, 2026.