Lakes / Iowa / Dallas County / Dale Maffit Reservoir
Dale Maffit Reservoir, Iowa
187 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
41.51 degrees N, 93.79 degrees W - Dallas 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 Dale Maffit Reservoir Stacks Up
- Larger than 69% of the 220 lakes counted in Iowa.
- The largest lake in Dallas County among those counted.
- About 10 miles from Des Moines, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Colechester | Warren | 5.5 mi | 153 acres |
| Grays Lake | Polk | 8.9 mi | 96 acres |
| Lake Easter | Polk | 12 mi | 177 acres |
| Cedar Lake | Madison | 15 mi | 84 acres |
| Brenton Slough | Polk | 15 mi | 62 acres |
| Saylorville Lake | Polk | 17 mi | 5,428 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 137047422). Verified October 30, 2026.