|Location||Alameda County, California|
|Basin countries||United States|
|Surface area||180 acres (73 ha)|
|Shore length1||6 miles (9.7 km)|
|1 Shore length is not a well-defined measure.|
The Bethany Reservoir is located 8 miles (13 km) northeast of Livermore, California, USA, on the California Aqueduct. It serves as the forebay for the South Bay Pumping Plant that feeds the South Bay Aqueduct.