Lakes in Mahaska County, Iowa
1 lakes counted in Mahaska County - the largest is Lake Keomah at 90 acres.
1
Lakes Counted
90 acres
Largest - Lake Keomah
Mahaska County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Keomah | Mahaska | 90 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.