| Competition: | Campeonato Brasileiro Série A |
| Season: | 1966 |
| Winners: | Cruzeiro 1st Taça Brasil title 1st Brazilian title |
| Continentalcup1: | Copa Libertadores de América |
| Continentalcup1 Qualifiers: | Cruzeiro Santos |
| Matches: | 47 |
| Total Goals: | 149 |
| League Topscorer: | Bita Toninho Guerreiro (10 goals) |
| Prevseason: | 1965 |
| Nextseason: | 1967 |
The 1966 Campeonato Brasileiro Série A (officially the 1966 Taça Brasil) was the 8th edition of the Campeonato Brasileiro Série A.
| Teams | Scores | Tie-breaker | |||||
|---|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | ||
| agin=center colspan="7" | Northern Group First Stage | ||||||
| Paysandu | 4:0 | Rio Negro | 6:0 | 3:0 | – | — | |
| Flamengo | 3:1 | 2:0 | 1:1 | – | – | ||
| agin=center colspan="7" | Northern Group Semifinal | ||||||
| Paysandu[1] | 2:2 | Flamengo | 2:0 | 0:2 | 0:0 | — | |
| agin=center colspan="7" | Northern Final | ||||||
| Fortaleza | 3:1 | Paysandu | 3:1 | 1:1 | — | — | |
| Teams | Scores | Tie-breaker | |||||
|---|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | ||
| agin=center colspan="7" | Northeastern Group First Stage | ||||||
| Campinense | 4:0 | ABC | 2:0 | 1:2 | – | — | |
| CSA | 4:0 | Confiança | 2:0 | 1:0 | – | — | |
| agin=center colspan="7" | Northeastern Group Semifinals | ||||||
| 0:4 | CSA | 2:3 | 0:2 | – | — | ||
| agin=center colspan="7" | Northeastern Group Finals | ||||||
| 0:4 | Vitória | 2:3 | 2:4 | – | — | ||
| Teams | Scores | Tie-breaker | |||||
|---|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | ||
| agin=center colspan="7" | Northern Zone Semifinals | ||||||
| 1:3 | Vitória | 1:1 | 0:4 | – | — | ||
| agin=center colspan="7" | Northern Zone Finals | ||||||
| Náutico | 4:0 | Vitória | 3:0 | 3:2 | – | — | |
| Teams | Scores | Tie-breaker | |||||
|---|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | ||
| agin=center colspan="7" | Southern Group First Stage | ||||||
| 1:3 | Ferroviário | 3:3 | 0:2 | – | — | ||
| agin=center colspan="7" | Southern Group Finals | ||||||
| 1:3 | Grêmio | 0:0 | 0:3 | — | — | ||
| Teams | Scores | Tie-breaker | |||||
|---|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | ||
| agin=center colspan="7" | Quarterfinals | ||||||
| 2:2 | Anápolis | 2:0 | 0:1 | 1:4 | – | ||
| 1:3 | Americano | 2:2 | 0:3 | – | – | ||
| agin=center colspan="7" | Semifinals | ||||||
| 2:2 | Americano | 2:0 | 1:2 | 2:3 | – | ||
| agin=center colspan="7" | Central Zone final | ||||||
| 0:4 | Cruzeiro | 0:4 | 1:6 | – | – | ||
Santos and Fluminense enter in this stage
| Teams | Scores | Tie-breaker | ||||
|---|---|---|---|---|---|---|
| Team 1 | Points | Team 2 | 1st leg | 2nd leg | 3rd leg | |
| 2:2 | Santos | 0:2 | 5:3 | 1:4 | ||
| Cruzeiro | 4:0 | Fluminense | 1:0 | 3:1 | — | |
----