Viradouro is a municipality in the state of São Paulo in Brazil. The population is 19,017 in an area of 218 km². The elevation is 528 m. I…Viradouro is a municipality in the state of São Paulo in Brazil. The population is 19,017 in an area of 218 km². The elevation is 528 m. In telecommunications, the city was served by Companhia Telefônica Brasileira until 1973, when it began to be served by Telecomunicações de São Paulo. In July 1998, this company was acquired by Telefónica, which adopted the Vivo brand in 2012.