Lakes / Idaho / Washington County
Lakes in Washington County, Idaho
10 lakes counted in Washington County - the largest is Brownlee Reservoir at 12,535.1 acres.
10
Lakes Counted
12,535.1 acres
Largest - Brownlee Reservoir
Washington County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Brownlee Reservoir | Washington | 12,535.1 acres | - |
| 2 | Crane Creek Reservoir | Washington | 2,920.79 acres | - |
| 3 | Paddock Valley Reservoir | Washington | 1,182.15 acres | - |
| 4 | Mann Creek Reservoir | Washington | 230.3 acres | - |
| 5 | Fairchild Reservoir | Washington | 96.62 acres | - |
| 6 | Soulen Reservoir | Washington | 91.43 acres | - |
| 7 | Buttermilk Slough | Washington | 59.8 acres | - |
| 8 | Barton Reservoir | Washington | 56.09 acres | - |
| 9 | Little Crane Creek Reservoir | Washington | 35.58 acres | - |
| 10 | Hornet Reservoir | Washington | 31.52 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.