São Luiz do Paraitinga ("Saint Louis of the Paraitinga") is a municipality (município) in the eastern part of the state of São Paulo in Brazil. The name Paraitinga comes from the Tupi language (Parahytinga) meaning clear water). The city is a major tourist destination of the Paraíba Valley region, particularly, due to its Historic Centre, declared a national heritage site, and its Caipira traditions, including the Folia do Divino and the Carnival of Marchinas.