Lakes / Oregon / Jefferson County
Lakes in Jefferson County, Oregon
15 lakes counted in Jefferson County - the largest is Lake Billy Chinook at 3,081 acres.
15
Lakes Counted
3,081 acres
Largest - Lake Billy Chinook
Jefferson County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Billy Chinook | Jefferson | 3,081 acres | - |
| 2 | Lake Billy Chinook | Jefferson | 772 acres | - |
| 3 | Lake Simtustus | Jefferson | 553 acres | - |
| 4 | Suttle Lake | Jefferson | 265 acres | - |
| 5 | Haystack Reservoir | Jefferson | 219 acres | - |
| 6 | Pelton Regulating Reservoir | Jefferson | 164 acres | - |
| 7 | Blue Lake | Jefferson | 61 acres | - |
| 8 | Boulder Lake | Jefferson | 58 acres | - |
| 9 | Brewer Reservoir | Jefferson | 57 acres | - |
| 10 | Little Willow Creek Reservoir | Jefferson | 53 acres | - |
| 11 | Square Lake | Jefferson | 50 acres | - |
| 12 | Island Lake | Jefferson | 33 acres | - |
| 13 | Harvey Lake | Jefferson | 29 acres | - |
| 14 | Trout Lake | Jefferson | 29 acres | - |
| 15 | Dark Lake | Jefferson | 25 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.