| Official Name: | Piracaia |
| Settlement Type: | Municipality |
| Pushpin Map: | Brazil |
| Pushpin Map Caption: | Location in Brazil |
| Coordinates: | -23.0539°N -46.3581°W |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | Region |
| Subdivision Name1: | Southeast |
| Subdivision Type2: | State |
| Subdivision Name2: | São Paulo |
| Subdivision Type3: | Mesoregion |
| Subdivision Type4: | Microregion |
| Subdivision Type5: | Metrop. region |
| Leader Title: | Mayor |
| Area Total Km2: | 386 |
| Population Total: | 27,462 |
| Population As Of: | 2020[1] |
| Population Density Km2: | auto |
| Blank Name Sec1: | HDI |
| Timezone1: | BRT |
| Utc Offset1: | −3 |
| Postal Code Type: | Postal code |
| Area Code Type: | Area code |
Piracaia is a municipality in the state of São Paulo in Brazil. The population is 27,462 (2020 est.) in an area of 386 km².[2] The elevation is 792 m. The municipality was established in 1859 as Santo Antônio da Cachoeira, and its name was changed to Piracaia on 20 August 1906.[3]
In telecommunications, the city was served by Companhia Telefônica Brasileira until 1973, when Telecomunicações de São Paulo took over.[4]