| Bertioga | |
| Official Name: | Municipality of Bertioga |
| Settlement Type: | Municipality |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Southeast |
| Subdivision Type3: | Metropolitan Region |
| Subdivision Name3: | Baixada Santista |
| Leader Title: | Mayor |
| Leader Name: | Caio Arias Matheus |
| Area Total Km2: | 490.15 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 64,723 |
| Population Density Km2: | auto |
| Timezone1: | BRT |
| Utc Offset1: | -3 |
| Coordinates: | -23.8547°N -46.1389°W |
| Elevation M: | 8 |
| Elevation Ft: | 26 |
| Blank Name: | HDI (2010) |
| Blank Info: | 0.730 – high[2] |
Bertioga is a Brazilian municipality in the state of São Paulo and part of the Baixada Santista Metropolitan Region.[3] Its population is 64,723 (2020 est.) in an area of 490.15 km2.[4] Because it neighbors resort towns, its population fluctuates greatly with the seasons. The more northern parts are densely forested and humanly unpopulated. It was created on 19 May 1991, from a part of Santos.
The municipality contains the Restinga de Bertioga State Park, created in 2010 to protect an area of mangroves, restinga and rainforest. Its limits are Mogi das Cruzes, Biritiba-Mirim and Salesópolis in the north, São Sebastião in the east, Atlantic Ocean to the south with Ilha de Santo Amaro (opposite the city) and Santos in the west.
Bertioga is where Josef Mengele, a Nazi doctor at Auschwitz, drowned in 1979.[5]
Bertiogo was served telecommunications by Companhia Telefônica Brasileira until 1973, when Telecomunicações de São Paulo took over.[6] In July 1998, it was acquired by Telefónica, which adopted the Vivo brand in 2012. It now sells and operates cell phones, fixed lines, internet access (fiber optic and 4G) and television reception (satellite and cable).[7]