Lakes / California / Los Angeles County / Castaic Lagoon
Castaic Lagoon, California
165 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
34.50 degrees N, 118.61 degrees W - Los Angeles 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 Castaic Lagoon Stacks Up
- Larger than 65% of the 1,147 lakes counted in California.
- About 38 miles from Los Angeles, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Castaic Lake | Los Angeles | 2.3 mi | 2,008 acres |
| Dry Canyon Reservoir | Los Angeles | 4.8 mi | 46 acres |
| Elderberry Forebay | Los Angeles | 4.9 mi | 388 acres |
| Lake Piru | Ventura | 8.3 mi | 1,066 acres |
| Bouquet Reservoir | Los Angeles | 14 mi | 590 acres |
| Pyramid Lake | Los Angeles | 14 mi | 1,177 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Castaic Lagoon
How Big Is Castaic Lagoon?
Castaic Lagoon covers 165 acres in Los Angeles County, California.
What Is the Largest Lake in Los Angeles County?
Castaic Lake is the largest lake in Los Angeles County, at 2,008 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 120025137). Verified October 30, 2026.