1966 Brazilian legislative election

Parliamentary elections were held in Brazil on 15 November 1966.[1] They were the first held since a military coup in 1964. In 1965, the military government of President Humberto de Alencar Castelo Branco shuttered all existing parties, and enacted a new electoral law that effectively limited the number of parties to two—the pro-government National Renewal Alliance and the opposition Brazilian Democratic Movement.

1966 Brazilian legislative election

15 November 1966
409 seats in the Chamber of Deputies 23 seats in the Senate
Party Leader % Seats ± Chamber of Deputies ARENA Artur da Costa e Silva 64.0 277 New MDB 36.0 132 New Senate ARENA Artur da Costa e Silva 56.6 19 New MDB 43.4 4 New This lists parties that won seats. See the complete results below.

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ARENA won a crushing 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.[2]