São Paulo Futebol Clube, more commonly referred to as simply São Paulo, is a professional football club in the Morumbi district of São Paulo, Brazil. It plays in Campeonato Paulista, São Paulo's premier state league and Campeonato Brasileiro Série A, the top tier of Brazilian football. Despite being primarily a football club, São Paulo competes in a wide variety of sports. Its home ground is the multipurpose 72,039-seater MorumBIS Stadium, the biggest private-owned field in Brazil. São Paulo is Brazil’s biggest worldwide champion and also one of the only two clubs that have never been relegated from the top division, the other being Flamengo.

The Brazilian states football championships are the professional adult male football competitions in Brazil that take place between January and April for the Northeast, Central-West, Southeast and South regions. In some states from the North Region, however, it takes place in May or June. One such league, the Campeonato Paulista, which started in 1902, is the oldest football competition in Brazil. All professional football clubs in Brazil play in a state championship, but not all qualify for the national league.