| Florence Lake Dam | |
| Location Map: | California |
| Coordinates: | 37.2725°N -118.9664°W |
| Country: | United States |
| Owner: | Southern California Edison |
| Dam Type: | Concrete multiple-arch |
| Dam Crosses: | South Fork San Joaquin River |
| Dam Height: | 154feet[1] |
| Dam Length: | 3156feet |
| Res Name: | Florence Lake |
| Res Capacity Total: | 64600acre feet |
| Res Catchment: | 171mi2 |
| Res Surface: | 296acres |
Florence Lake Dam is a concrete multiple-arch dam on the South Fork of the San Joaquin River, in Fresno County, California in the United States. The 171feet high dam was designed by John S. Eastwood and completed in 1926 (two years after Eastwood's death) as part of the Big Creek Hydroelectric Project, an extensive hydroelectric system in the central Sierra Nevada. Its reservoir, Florence Lake, provides for water diversion to Huntington Lake and Big Creek Powerhouses Nos. 1–3 via the 13miles Ward Tunnel.