| Competition: | Campeonato Alagoano de Futebol |
| Season: | 2012 |
| Winners: | CRB |
| Relegated: | Coruripe Penedense |
| Continentalcup1: | Copa do Brasil |
| Continentalcup1 Qualifiers: | CRB ASA |
| Continentalcup2: | Série D |
| Continentalcup2 Qualifiers: | CSA |
| League Topscorer: | Lúcio Maranhão (ASA) (21 goals) |
| Continentalcup3: | Copa do Nordeste |
| Continentalcup3 Qualifiers: | CRB ASA |
| Matches: | 104 |
| Total Goals: | 313 |
| Prevseason: | 2011 |
| Nextseason: | 2013 |
The 2012 Campeonato Alagoano de Futebol was the 82nd season of Alagoas's top professional football league. The competition began on January 14 and ended on May 12. CRB won the championship for the 26th time, while Associação Atlética Coruripe and Penedense were relegated.
The tournament consists of a double round-robin format, in which all twelve teams play each other twice, with classification split in two stages. Each round counts as one stage. The four better-placed teams of each stage will face themselves in playoffs matches, and the first stage champion will face the second stage champion. If the same team win both stages, it will be considered the champion.
The bottom two teams on overall classification will be relegated.
----
ASA won 6-1 on aggregated----CRB won 6-1 on aggregated
----
CSA won 3-2 on aggregated----ASA won 6-3 on aggregated