| Official Name: | Arujá |
| Mapsize: | 250px |
| Pushpin Map: | Brazil |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Southeast |
| Subdivision Name2: | São Paulo |
| Subdivision Type3: | Metropolitan Region |
| Subdivision Name3: | São Paulo |
| Leader Title: | Mayor |
| Leader Name: | Luis Antonio de Camargo (PSD) |
| Area Total Km2: | 96.17 |
| Population As Of: | 2020 [1] |
| Population Total: | 91,157 |
| Population Density Km2: | auto |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -23.3967°N -46.3211°W |
| Elevation M: | 755 |
| Blank Name: | HDI (2000) |
| Blank Info: | 0,788 medium |
Arujá is a city in the state of São Paulo in Brazil. It is part of the Metropolitan Region of São Paulo.[2] The population is 91,157 (2020 est.) in an area of 96.17 km².[3] Its boundaries are Santa Isabel in the north and the northeast, Mogi das Cruzes in the southeast, Itaquaquecetuba in the south and Guarulhos to the west and the northwest.
The municipality contains part of the Mananciais do Rio Paraíba do Sul Environmental Protection Area, created in 1982 to protect the sources of the Paraíba do Sul river.
In telecommunications, the city was served by Companhia de Telecomunicações do Estado de São Paulo until 1975, when it began to be served by Companhia Telefônica da Borda do Campo. 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).[4]