Jundiaí is a city and county in the São Paulo , Brazil. Its coordinates are . The population in 2004 is 340,907, the area is 433.958 km² The elevation is 761 m. Distance is 50 km north of the city of São Paulo. This place name comes from the Tupi language.

It has a great population growth, generated by people having a search of better conditions of life along with residents of São Paulo.

Serra do Japi , situated southeast of the city, is a great ambient reserve, with one of the largest forested areas of the state of São Paulo.