1977 South African general election

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164 of the 165 seats in the House of Assembly 83 seats needed for a majority
Registered	2,193,635
Turnout	48.52% ( 3.35pp)
First party Second party Third party   NRP Leader B. J. Vorster Colin Eglin Radclyffe Cadman Party National Progressive New Republic Last election 56.14%, 122 seats 6.37%, 6 seats 32.84%, 41 seats[a] Seats won 134 17 10 Seat change 12 11 31 Popular vote 685,035 177,705 127,335 Percentage 65.34% 16.95% 12.15% Swing 9.20pp 10.58pp 20.69pp
Prime Minister before election B. J. Vorster National Elected Prime Minister B. J. Vorster National

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General elections were held in South Africa on 30 November 1977. The National Party, led by B. J. Vorster won a landslide victory in the House of Assembly. The newly formed Progressive Federal Party, led by Colin Eglin became the official opposition. The New Republic Party, successor to the United Party, won only 10 seats,^[1] all but one of them in Natal Province. Once again, the Herstigte Nasionale Party failed to win any seats.

In the 1977 elections, the National Party received its best-ever result with support of 65% of the vote and (after a by-election) 135 seats in parliament out of 165. However, Vorster resigned as prime minister for alleged health reasons on 28 September 1978.

The members of the House of Assembly were elected in single-member constituencies via first-past-the-post voting. The Senate consisted of 51 members: 43 elected by the electoral colleges of the country's four provinces (16 for the Transvaal, 11 for the Cape Province, and 8 each for the Orange Free State and Natal) and 8 appointed by the State President (2 for each province). Only White South Africans were eligible to vote.

On 11 February 1975 four liberal MPs led by Harry Schwarz broke away from the United Party and created the Reform Party. The party merged with the Progressive Party on 25 July 1975 to form the Progressive Reform Party. In 1977 another group of United Party members left the party to form the Committee for a United Opposition, which then joined the Progressive Reform Party to form the Progressive Federal Party. This proved to realign the opposition in Parliament, as the PFP became the official opposition party.

Due to the death of the National Party candidate in the Springs constituency, one seat was left vacant until a by-election was held, which was won by the NP.^[2]

Party		Votes	%	Seats	+/–
	National Party	685,035	65.34	134	+12
	Progressive Federal Party	177,705	16.95	17	+11
	New Republic Party	127,335	12.15	10	New
	Herstigte Nasionale Party	34,159	3.26	0	0
	South African Party	17,915	1.71	3	New
	Other parties and independents	6,271	0.60	0	0
Vacant				1	–
Total		1,048,420	100.00	165	–6
Valid votes		1,048,420	98.50
Invalid/blank votes		15,930	1.50
Total votes		1,064,350	100.00
Registered voters/turnout		2,193,635	48.52
Source: Official Yearbook[2]