Lakes / Iowa / Union County / Green Valley Lake
Green Valley Lake, Iowa
330 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
41.11 degrees N, 94.39 degrees W - Union 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 Green Valley Lake Stacks Up
- Larger than 81% of the 220 lakes counted in Iowa.
- About 52 miles from Des Moines, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Summit Lake | Union | 3.0 mi | 105 acres |
| Twelve Mile Lake | Union | 6.8 mi | 644 acres |
| Three Mile Lake | Union | 8.3 mi | 836 acres |
| Nodaway Lake | Adair | 14 mi | 26 acres |
| Greenfield Lake | Adair | 14 mi | 27 acres |
| East Lake | Adams | 17 mi | 31 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Green Valley Lake
How Big Is Green Valley Lake?
Green Valley Lake covers 330 acres in Union County, Iowa.
What Is the Largest Lake in Union County?
Three Mile Lake is the largest lake in Union County, at 836 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 107254469). Verified October 30, 2026.