Represa Santa Branca is a reservoir covering 7.81 km² located in the municipality of Santa Branca, in the state of São Paulo, Brazil. It is operated by Light – Serviços de Eletricidade and is open to the public free of charge. The reservoir sits within the Jardim Santa Branca neighborhood, approximately 4 km from the town center, and is accessible year-round via Avenida Santa Luzia.

The reservoir is suitable for boat touring and water sports. One notable feature of paddling here is the presence of small islands scattered across the water, which support populations of wildlife including wild animals and birds, making them worthwhile destinations during an outing on the water. The area known as Toca do Leitão, situated along the reservoir's banks, provides a broad recreational space that also serves as a practical reference point for access.

Beyond the water itself, the surrounding municipality offers some historical context worth noting for those spending time in the area. A historic metal bridge over the Rio Paraíba do Sul, constructed in 1902 under the direction of the writer and engineer Euclides da Cunha, is located about 4 km from town along Rodovia Nilo Máximo (SP-77). Euclides da Cunha completed the final revisions of his landmark work "Os Sertões" during his time in Santa Branca, and the book was published around the time the bridge was inaugurated.