The 2018 Copa Paulista was the 20th edition of São Paulo State Cup. 27 teams participate in the tournament. The winner gets to choose between a qualification spot for the 2019 Copa do Brasil or the 2019 Campeonato Brasileiro Série D. The spot not chosen by the winners will be taken by the second-placed team.
Votuporanguense defeated Ferroviária on the finals to win their first title. As champions, Votuporanguense chose to qualify to the 2019 Copa do Brasil and thus Ferroviária qualified to the 2019 Campeonato Brasileiro Série D.
Format
First Stage: The clubs will be divided into four groups according to their location. The top four of each group will advance to the second stage.
Second Stage: The 16 clubs will be divided into four groups of four. The winner and runners-up of each group will advance to the Knockout stage.
Each stage will be played in a double round-robin format.