Lakes / Iowa / Clay County / Round Lake
Round Lake, Clay County, Iowa
26 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
43.17 degrees N, 94.96 degrees W - Clay 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 Round Lake Stacks Up
- Larger than 1% of the 220 lakes counted in Iowa.
- About 18 miles from Okoboji, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Trumbull Lake | Clay | 1.7 mi | 1,061 acres |
| Mud Lake | Clay | 2.6 mi | 283 acres |
| Lost Island Lake | Palo Alto | 2.8 mi | 1,152 acres |
| Dan Green Slough | Clay | 4.2 mi | 278 acres |
| Blue Wing Marsh | Palo Alto | 4.4 mi | 76 acres |
| Virgin Lake | Palo Alto | 5.7 mi | 208 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Round Lake
How Big Is Round Lake?
Round Lake covers 26 acres in Clay County, Iowa.
What Is the Largest Lake in Clay County?
Trumbull Lake is the largest lake in Clay County, at 1,061 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 132544859). Verified October 30, 2026.