Sobradinho Reservoir
                    General data
- Name: Sobradinho Reservoir
 - Water system: Sao Francisco River
 - Water type: Artificial lake
 - Progression: Sao Francisco River -> Atlantic Ocean -> Planet Earth
 - Climates: Tropical, Subtropical
 - Continents: South America
 - Countries: Brazil
 
The Sobradinho Reservoir (Portuguese: Lago de Sobradinho) is a large reservoir located in Sobradinho, north of the Brazilian state of Bahia. The reservoir measures approximately 320 km long, 4,214 km2 in surface area, and a storage capacity of 34.1 km3 at its nominal elevation of 392.5 m, making it the 15th largest reservoir (artificial lake) in the world. The lake encloses the waters of the São Francisco River, one of the largest and most important rivers in Brazil.