Lakes / Oregon / Washington County
Lakes in Washington County, Oregon
3 lakes counted in Washington County - the largest is Henry Hagg Lake at 1,086 acres.
3
Lakes Counted
1,086 acres
Largest - Henry Hagg Lake
Washington County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Henry Hagg Lake | Washington | 1,086 acres | - |
| 2 | Barney Reservoir | Washington | 342 acres | - |
| 3 | Stimson Millpond | Washington | 46 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.