Lakes / Iowa / Mahaska County / Lake Keomah
Lake Keomah, Iowa
90 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
41.29 degrees N, 92.54 degrees W - Mahaska 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 Keomah Stacks Up
- Larger than 47% of the 220 lakes counted in Iowa.
- About 60 miles from Des Moines, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Miami | Monroe | 20 mi | 121 acres |
| Lake Ponderosa | Poweshiek | 20 mi | 111 acres |
| Diamond Lake | Poweshiek | 20 mi | 90 acres |
| Lake Ponderosa | Poweshiek | 21 mi | 168 acres |
| Lake Red Rock | Marion | 28 mi | 8,619 acres |
| Lake Iowa | Iowa | 30 mi | 81 acres |
Straight-line distance between lake centers.
Facts and Figures
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 133404976). Verified October 30, 2026.