Lakes / Idaho / Cassia County / Lake Walcott
Lake Walcott, Idaho
11,782.92 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
42.66 degrees N, 113.32 degrees W - Cassia 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 Lake Walcott Stacks Up
- Ranks #10 for surface area among the Idaho lakes counted so far - 11,782.92 acres.
- The largest lake in Cassia County among those counted.
- About 58 miles from Twin Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bonanza Lake | Power | 13 mi | 30.64 acres |
| Emerald Lake | Minidoka | 22 mi | 34.59 acres |
| Sublett Reservoir | Cassia | 27 mi | 94.91 acres |
| American Falls Reservoir | Power | 33 mi | 55,319.78 acres |
| Milner Lake | Cassia | 36 mi | 103.88 acres |
| Independence Lakes | Cassia | 36 mi | 26.84 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Walcott
How Big Is Lake Walcott?
Lake Walcott covers 11,782.92 acres in Cassia County, Idaho.
What Is the Largest Lake in Cassia County?
Lake Walcott is the largest lake in Cassia County, at 11,782.92 acres.
Largest Lakes in Idaho
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pend Oreille | Bonner | 92,764.44 acres | - |
| 2 | American Falls Reservoir | Power | 55,319.78 acres | - |
| 3 | Coeur d'Alene Lake | Kootenai | 26,891.64 acres | - |
| 4 | Lake Cascade | Valley | 25,043.4 acres | - |
| 5 | Priest Lake | Bonner | 23,425.59 acres | - |
All 316 Idaho lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 61703875). Verified October 30, 2026.