Piracaia is a municipality in the state of São Paulo in Brazil. According to the 2022 Brazilian census, it had a population of 26,029, a population density of 67.51 inhabitants per square kilometre, and an area of 385.64 km2 (148.90 sq mi); its population was estimated at 26,795 in 2025. The municipality was created in 1859 as Santo Antônio da Cachoeira, and its name was changed to Piracaia on 20 August 1906. In telecommunications, the city was served by Companhia Telefônica Brasileira until 1973, when Telecomunicações de São Paulo took over. More information...
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