Riversul is a municipality in the state of São Paulo in Brazil. The population is 5,443 (2020 est.) in an area of 386 km<sup>2</sup>. The elevation is 587m. Its original name was Ribeirão Vermelho do Sul (trans.: "Red Southern Creek"), but due to a homonymous municipality, its name was contracted to this current form in 1980.
In telecommunications, the city was served by until 1975, when it began to be served by . In July 1998, this company was acquired by Telefónica, which adopted the Vivo brand in 2012.
The company is currently an operator of cell phones, fixed lines, internet (fiber optics/4G) and television (satellite and cable).