| Table 14 : Congressional Elections of 1966 | ||||
| São Paulo | Minas | Guanabara | Brazil | |
| ARENA (government) | 34,6 | 63,6 | 20,4 | 50.5 |
| MDB (opposition) | 30,0 | 19,0 | 54.2 | 28,4 |
| blank and null | 35,4 | 17,4 | 25,4 | 21,1 |
| Totals | 100% | 100% | 100% | 100% |
| Source : IBGE, Anuário Estatistico do Brasil, 1969 | ||||