Lakes / Iowa / Tama County / Union Grove Lake
Union Grove Lake, Iowa
106 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
42.13 degrees N, 92.72 degrees W - Tama 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 Union Grove Lake Stacks Up
- Larger than 55% of the 220 lakes counted in Iowa.
- The largest lake in Tama County among those counted.
- About 55 miles from Cedar Rapids, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Sportsman Lake | Tama | 8.4 mi | 33 acres |
| Otter Creek Lake | Tama | 12 mi | 61 acres |
| Cherry Lake | Tama | 14 mi | 30 acres |
| Upper Pine Lake | Hardin | 24 mi | 89 acres |
| Holiday Lake | Poweshiek | 26 mi | 90 acres |
| Rock Creek Lake | Jasper | 27 mi | 515 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Union Grove Lake
How Big Is Union Grove Lake?
Union Grove Lake covers 106 acres in Tama County, Iowa.
What Is the Largest Lake in Tama County?
Union Grove Lake is the largest lake in Tama County, at 106 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 155095576). Verified October 30, 2026.