| Barrett Dam | |
|---|---|
 Barrett Dam, seen nearly complete in 1922 | |
  Location of Barrett Dam in California  Barrett Dam (California)  Barrett Dam (the United States) | |
| Country | United States |
| Location | San Diego County, California |
| Coordinates | 32°40′44″N 116°40′14″W / 32.67889°N 116.67056°W |
| Purpose | Water supply |
| Construction began | 1921 |
| Opening date | 1923 |
| Owner(s) | City of San Diego |
| Dam and spillways | |
| Type of dam | Concrete gravity arch |
| Impounds | Cottonwood Creek |
| Height | 171 ft (52 m)[1] |
| Length | 746 ft (227 m)[1] |
| Reservoir | |
| Creates | Barrett Lake |
| Total capacity | 34,206 acre⋅ft (42,192,000 m3)[1] |
| Catchment area | 252 sq mi (650 km2)[2] |
| Surface area | 891 acres (361 ha)[2] |
Barrett Dam is a concrete arch-gravity dam in southern San Diego County, California, United States, forming Barrett Lake on Cottonwood Creek. The dam is part of the city of San Diego's local water supply system.