2020 Campeonato Alagoano
The 2020 Campeonato Alagoano was the 90th edition of the top football league in Alagoas. It began on 22 January 2020 and ended on 5 August 2020.
The final was played behind closed doors between CSA and CRB at the Estádio Rei Pelé in Maceió on 5 August 2020. CRB won the match 1–0, securing their 31st title.
First phase
Originally, the team with the lowest number of points would be relegated to Campeonato Alagoano Sub 23–Série B 2021, however due to the COVID-19 pandemic in Brazil, the relegation in the 2020 season was canceled by FAF.Knockout phase
Semi-finals
----''CSA and CRB qualified for 2021 Copa do Brasil''
2021 Copa do Brasil play-off
2020 Campeonato Alagoano third place Murici and 2020 Copa Alagoas champions ASA played a two-legged play-off to determine the third team qualified for the 2021 Copa do Brasil. If tied on aggregate, the penalty shoot-out would be used to determine the winner.Matches
----''Murici qualified for 2021 Copa do Brasil''