1966 Brazilian legislative election
# 1966 Brazilian legislative election

Parliamentary elections were held in Brazil on 15 November 1966. They were the first elections held after a military coup in 1964. In 1965 the military government of President Humberto de Alencar Castelo Branco dissolved all existing parties, and enacted a new electoral law that effectively limited the number of parties to two — the pro-government National Renewal Alliance (ARENA) and the opposition Brazilian Democratic Movement.

ARENA won a landslide victory, taking 277 of the 409 seats in the Chamber of Deputies and 19 of the 23 seats in the Senate. Voter turnout was 77.2% in the Chamber of Deputies election and 77.3% in the Senate election.

## Results

### Chamber of Deputies

Seats :

| | National Renewal Alliance | 8,731,638 | 63.98 | 277 |
| - | - | - | - | - |
| | Brazilian Democratic Movement | 4,915,470 | 36.02 | 132 |
| Total | Total | 13,647,108 | 100.00 | 409 |
| Valid votes | Valid votes | 13,647,108 | 78.95 | |
| Invalid/blank votes | Invalid/blank votes | 3,638,448 | 21.05 | |
| Total votes | Total votes | 17,285,556 | 100.00 | |
| Registered voters/turnout | Registered voters/turnout | 22,387,251 | 77.21 | |
| Source: Nohlen |||||

### Senate

| Party | Party | Votes | % | Seats |
| - | - | - | - | - |
| | National Renewal Alliance | 7,719,382 | 56.63 | 19 |
| | Brazilian Democratic Movement | 5,911,361 | 43.37 | 4 |
| Total | Total | 13,630,743 | 100.00 | 23 |
| Valid votes | Valid votes | 13,630,743 | 78.97 | |
| Invalid/blank votes | Invalid/blank votes | 3,628,855 | 21.03 | |
| Total votes | Total votes | 17,259,598 | 100.00 | |
| Registered voters/turnout | Registered voters/turnout | 22,335,242 | 77.28 | |
| Source: Nohlen |||||
