Lakes / California / Contra Costa County / Willow Lake
Willow Lake, Contra Costa County, California
89 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
37.91 degrees N, 121.60 degrees W - Contra Costa County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Willow Lake Stacks Up
- Larger than 52% of the 1,147 lakes counted in California.
- About 46 miles from San Francisco, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Clifton Court Forebay | Contra Costa | 5.0 mi | 2,215 acres |
| Marsh Creek Reservoir | Contra Costa | 7.2 mi | 51 acres |
| Bethany Reservoir | Alameda | 9.0 mi | 164 acres |
| Antioch Municipal Reservoir | Contra Costa | 12 mi | 57 acres |
| Contra Loma Reservoir | Contra Costa | 13 mi | 69 acres |
| Lake Lincoln | San Joaquin | 14 mi | 54 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Willow Lake
How Big Is Willow Lake?
Willow Lake covers 89 acres in Contra Costa County, California.
What Is the Largest Lake in Contra Costa County?
Clifton Court Forebay is the largest lake in Contra Costa County, at 2,215 acres.
Largest Lakes in California
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Salton Sea | Imperial | 233,096 acres | - |
| 2 | Lake Tahoe | Placer | 122,975 acres | - |
| 3 | Goose Lake | Modoc | 93,048 acres | - |
| 4 | Honey Lake | Lassen | 59,917 acres | - |
| 5 | Mono Lake | Mono | 45,124 acres | - |
All 1,147 California lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 153038808). Verified October 30, 2026.