Lakes / Iowa / Delaware County / Hartwick Lake
Hartwick Lake, Iowa
506 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
42.42 degrees N, 91.38 degrees W - Delaware 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 Hartwick Lake Stacks Up
- Larger than 87% of the 220 lakes counted in Iowa.
- The largest lake in Delaware County among those counted.
- About 34 miles from Cedar Rapids, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Quaker Mill Pond | Delaware | 8.2 mi | 105 acres |
| Backbone Lake | Delaware | 16 mi | 101 acres |
| Wood Duck Slough | Clayton | 28 mi | 286 acres |
| Little Lewis Lake | Linn | 29 mi | 37 acres |
| Big Lewis Lake | Linn | 29 mi | 26 acres |
| Lake Oelwein | Buchanan | 30 mi | 42 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Hartwick Lake
How Big Is Hartwick Lake?
Hartwick Lake covers 506 acres in Delaware County, Iowa.
What Is the Largest Lake in Delaware County?
Hartwick Lake is the largest lake in Delaware County, at 506 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 155588606). Verified October 30, 2026.