The 80th season of the Campeonato Catarinense began on January 23, 2005, and ended on April 17, 2005.
Série A1
First stage
Second stage
Third stage
The winner of the third stage is crowned the champion. The champion qualify to Campeonato Brasileiro Série C 2005 and qualify to Copa do Brasil 2006
The teams that do not participate in Brazilian Série A and Brazilian Série B will participate in Série A2.
*The first games were played in Team 1 Stadium
Italic: Teams qualify to Final
* The Game 2 was played in Ibirama, because the Clube Atlético Hermann Aichinger (Atlético de Ibirama) had better Punctuation in the two stages (Stage 1 points + Stage 2 points).
* Atlético de Ibirama qualify to Série C, because Criciúma already was qualify to Serie B.
Série A2: 12 Teams
* Marcílio Dias qualify to Série C, because Joinville already was qualify to Serie C
Série B1: 10 teams
*The Serie A2 transformed in 2006 in Divisão Especial and Série B1 in Divisão de Accesso