The 2019–20 Campeonato de Portugal was the seventh season of Portuguese football's renovated third-tier league, since the merging of the Segunda Divisão and Terceira Divisão in 2013, and the fifth season under the current Campeonato de Portugal title. A total of 72 teams competed in this league, which began in August 2019 and was scheduled to finish in June 2020.
The competition format consisted of two stages. In the first stage, the 72 clubs were divided in four series of 18 teams, according to geographic criteria. In each series, teams played against each other in a home-and-away double round-robin system. The two best-placed teams in each series would advance to the second stage, while the five bottom teams would be relegated to the District championships.
In the second stage, the eight teams disputed a series of double-legged home-and-away play-off matches, and the two play-off finalist teams would be promoted to the 2020–21 LigaPro.[2]
Mosteirense, Portalegre FA District League Champions declined to be promoted. Eléctrico, Portalegre FA District League Runners-up declined as well. In this case, Valadares Gaia was invited as AF Porto District League Runner-up (AF Porto is the Football Association with most teams in national leagues) and accepted the invitation.