Oeste

The club was founded in 1921 by two brothers from Rio de Janeiro. One was a supporter of Flamengo, while the other was a supporter of Fluminense. A training match against an amateur club from the municipality of Fazenda Itaquerê was set to decide if the club would be named Flamengo or Fluminense. With a victory, the club would be named Flamengo, while if defeated the club would be named Fluminense. The club beat their opponents 3–0, but adopted the name Oeste Futebol Clube, after the Center-West region of São Paulo state, while Flamengo's colors were chosen.

The club competed in the Campeonato Paulista Série A1 for the first time in 2004, after winning the Série A2 in the previous season. The club returned to the Série A1 in 2009, after being defeated by Santo André in the Série A2 final in 2008. Oeste won the 2012 Série C after beating Icasa in the final. In 2016, they sealed a partnership with Grêmio Osasco Audax, 2016 Campeonato Paulista A1 runners-up, for the 2016 Serie B, which included mixing players from both teams in one squad and playing home games at Audax's stadium in Osasco.

In 2017, Oeste was relocated definitely to the city of Barueri, since the Estádio Municipal dos Amaros wasn't allowed to host Série B matches due to its limitations, and the City Hall of Itápolis, owners of the stadium, couldn't reach an agreement with the club.