Guapiara is a municipality in the state of São Paulo in Brazil. The population is 17,025 (2020 est.) in an area of 408 km<sup>2</sup>. Its elevation is 750 m.
The municipality was created by state law in 1948.
The municipality contains part of the Serra do Mar Environmental Protection Area, created in 1984. It contains part of the Intervales State Park, created in 1995.
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).