The 2018–19 Campeonato de Portugal was the sixth season of Portuguese football's new third-tier league, since the merging of the Segunda Divisão and Terceira Divisão in 2013, the fourth season under the current Campeonato de Portugal title, and the 72nd season of recognised third-tier football in Portugal. A total of 72 teams competed in this division, which began in August 2018 and ended in June 2019.