Santo Antônio de Posse is a municipality in the state of São Paulo in Brazil. It is part of the Metropolitan Region of Campinas.[2] The population is 23,529 (2020 est.) in an area of 154.13 km2.[3] The elevation is 695 m. Nearby cities are Jaguariuna, Campinas, Americana, Holambra, Amparo, Serra Negra, Artur Nogueira, Mogi Mirim, Mogi Guacu, Cosmopolis, Espirito Santo do Pinhal.