Lakes / California / Sonoma County
Lakes in Sonoma County, California
5 lakes counted in Sonoma County - the largest is Lake Sonoma at 2,235 acres.
5
Lakes Counted
2,235 acres
Largest - Lake Sonoma
Sonoma County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Sonoma | Sonoma | 2,235 acres | - |
| 2 | Santa Rosa Creek Reservoir | Sonoma | 59 acres | - |
| 3 | Merlo Lake | Sonoma | 44 acres | - |
| 4 | Lake Ilsanjo | Sonoma | 32 acres | - |
| 5 | Lytton Lake | Sonoma | 29 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.