Lakes / Colorado / Washington County
Lakes in Washington County, Colorado
3 lakes counted in Washington County - the largest is Prewitt Reservoir at 1,888 acres.
3
Lakes Counted
1,888 acres
Largest - Prewitt 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 | Prewitt Reservoir | Washington | 1,888 acres | - |
| 2 | Deering Lake | Washington | 78 acres | - |
| 3 | A-27 Reservoir | Washington | 31 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.