Ourinhos is a municipality located in the interior of the state of São Paulo, Brazil. Situated approximately 370 km west of the state capital, the city covers a total area of 296 km² (114 sq mi). It is positioned roughly 994 km from Brasília, the federal capital of Brazil.
According to the 2022 Brazilian census conducted by the Brazilian Institute of Geography and Statistics (IBGE), Ourinhos has a population of 103,970. This figure ranks it as the 76th most populous municipality within the state of São Paulo.