1966 Brazilian parliamentary election

← 1962 15 November 1966 1970 →

409 seats in the Chamber of Deputies 23 seats in the Senate

Party Leader Vote % Seats Chamber of Deputies ARENA Artur da Costa e Silva 63.98 277 MDB 36.02 132 Senate ARENA Artur da Costa e Silva 56.63 19 MDB 43.37 4 This lists parties that won seats. See the complete results below.

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Parliamentary elections were held in Brazil on 15 November 1966.^[1] 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]

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