Lakes / California / Merced County
Lakes in Merced County, California
16 lakes counted in Merced County - the largest is San Luis Reservoir at 12,831 acres.
16
Lakes Counted
12,831 acres
Largest - San Luis Reservoir
Merced County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | San Luis Reservoir | Merced | 12,831 acres | - |
| 2 | O'Neill Forebay | Merced | 2,246 acres | - |
| 3 | Los Banos Reservoir | Merced | 469 acres | - |
| 4 | Yosemite Lake | Merced | 414 acres | - |
| 5 | San Luis Reservoir | Merced | 138 acres | - |
| 6 | Kelsey Reservoir | Merced | 109 acres | - |
| 7 | Big Water Lake | Merced | 91 acres | - |
| 8 | Big Buttonwillow Lake | Merced | 68 acres | - |
| 9 | Little Buttonwillow Lake | Merced | 66 acres | - |
| 10 | San Luis Holding Reservoir | Merced | 66 acres | - |
| 11 | Mud Slough | Merced | 63 acres | - |
| 12 | Flat Pond | Merced | 56 acres | - |
| 13 | Mud Slough | Merced | 56 acres | - |
| 14 | Los Banos Creek | Merced | 46 acres | - |
| 15 | Los Banos Creek | Merced | 40 acres | - |
| 16 | Upper Ruth Lake | Merced | 29 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.