Cajamar is a municipality in the State of São Paulo, Brazil. It is part of the Metropolitan Region of São Paulo. The population is 77,934 in an area of 131.39 km². It is bordered by Jundiaí to the north, Franco da Rocha and Caieiras to the east, the capital of the southeast, Santana do Parnaíba and Pirapora do Bom Jesus in the west. It became a municipality in 1959, when emancipated from Santana do Parnaíba.