Sertãozinho is a Brazilian municipality located in the state of São Paulo. It covers an area of approximately 403 km² and had a population of about 127,142 as of 2020. The municipality is situated roughly 325 km from the city of São Paulo and 702 km from Brasília.
The administrative territory of Sertãozinho consists of the main city itself along with two distinct districts: Cruz das Posses and Vila Garcia.