Lakes in Polk County, Iowa
5 lakes counted in Polk County - the largest is Saylorville Lake at 5,428 acres.
5
Lakes Counted
5,428 acres
Largest - Saylorville Lake
Polk County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Saylorville Lake | Polk | 5,428 acres | - |
| 2 | Big Creek Lake | Polk | 856 acres | - |
| 3 | Lake Easter | Polk | 177 acres | - |
| 4 | Grays Lake | Polk | 96 acres | - |
| 5 | Brenton Slough | Polk | 62 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.