Lakes / California / Ventura County / Lake Casitas
Lake Casitas, California
1,540 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
34.39 degrees N, 119.34 degrees W - Ventura 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 Lake Casitas Stacks Up
- Larger than 92% of the 1,147 lakes counted in California.
- The largest lake in Ventura County among those counted.
- About 67 miles from Los Angeles, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Matilija Lake | Ventura | 7.1 mi | 30 acres |
| Jameson Lake | Santa Barbara | 11 mi | 123 acres |
| Gibraltar Reservoir | Santa Barbara | 21 mi | 207 acres |
| Devereux Lagoon | Santa Barbara | 30 mi | 39 acres |
| Wood Ranch Reservoir | Ventura | 31 mi | 217 acres |
| Lake Sherwood | Ventura | 32 mi | 138 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Casitas
How Big Is Lake Casitas?
Lake Casitas covers 1,540 acres in Ventura County, California.
What Is the Largest Lake in Ventura County?
Lake Casitas is the largest lake in Ventura County, at 1,540 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 120028191). Verified October 30, 2026.