electionstracker

Spain 1977 general election

What was the result of the 1977 general election in Spain?

Union of the Democratic Centre won 166 of 350 seats with 34.5% of the vote. 78.8% of registered voters cast a ballot.

  • Spain
  • Held:
  • Final result
  • ParlGov, read 5 October 2026

Which party won the most seats?

Final results from ParlGov, read : Union of the Democratic Centre won 166 of 350 seats with 34.5% of the vote; 78.8% of registered voters cast a ballot.

  • Union of the Democratic Centre 166 34.5%
  • Spanish Socialist Workers' Party 118 29.4%
  • Communist Party / United Left 19 9.3%
  • People's Party 16 8.2%
  • People's Socialist Party 6 4.5%
  • Convergence and Union 11 2.8%
  • Basque Nationalist Party 8 1.6%
  • Christian Democratic Team of the Spanish State 0 1.2%
  • Union of Centre and Christian Democracy of Catalonia 2 0.9%
  • Republican Left of Catalonia 1 0.8%
  • Euskadiko Ezkerra 1 0.3%
  • Aragonese Party 1 0.2%
  • Seats won
  • Share of the vote
176 of 350 seats make a majority

Key numbers

  1. 34.5%

    Share of the vote won by Union of the Democratic Centre and its allies

    Union of the Democratic Centre and its allies won 166 of 350 seats. A majority needs 176.

  2. 78.8%

    Voter turnout

Seats and votes by party

PartySeats%Votes
Union of the Democratic Centrewith Liberal Party16634.56,310,391
Spanish Socialist Workers' Party11829.45,371,866
Communist Party / United Left199.31,709,890
People's Party168.21,504,771
People's Socialist Party64.5816,582
Convergence and Union112.8514,647
Basque Nationalist Party81.6296,193
Christian Democratic Team of the Spanish State01.2215,841
Union of Centre and Christian Democracy of Catalonia20.9172,791
Republican Left of Catalonia10.8143,954
Euskadiko Ezkerra10.361,417
Aragonese Party10.237,183
Other parties (seats only)10.229,834
Votes by party
  • Union of the Democratic Centre 6,310,391
  • Spanish Socialist Workers' Party 5,371,866
  • Communist Party / United Left 1,709,890
  • People's Party 1,504,771
  • People's Socialist Party 816,582
  • Convergence and Union 514,647
  • Basque Nationalist Party 296,193
  • Christian Democratic Team of the Spanish State 215,841
  • Union of Centre and Christian Democracy of Catalonia 172,791
  • Republican Left of Catalonia 143,954
  • Euskadiko Ezkerra 61,417
  • Aragonese Party 37,183
  • Other parties (seats only) 29,834

ParlGov lists parties with at least 1 percent of the vote or 2 seats, so the rows do not add up to the valid votes.

ParlGov counts an alliance's votes and seats under its first party: such a row names the allies it counts.

How many people voted?

78.8% of the 23,583,762 registered voters cast a ballot (18,590,130 ballots). 18,278,085 of them were valid votes.

How do the votes compare with the seats?

  • Union of the Democratic Centre34.5% of votes47.4% of seats
  • Spanish Socialist Workers' Party29.4% of votes33.7% of seats
  • Communist Party / United Left9.3% of votes5.4% of seats
  • People's Party8.2% of votes4.6% of seats
  • Convergence and Union2.8% of votes3.1% of seats
  • Basque Nationalist Party1.6% of votes2.3% of seats
  • People's Socialist Party4.5% of votes1.7% of seats
  • Union of Centre and Christian Democracy of Catalonia0.9% of votes0.6% of seats
  • Republican Left of Catalonia0.8% of votes0.3% of seats
  • Euskadiko Ezkerra0.3% of votes0.3% of seats
  • Aragonese Party0.2% of votes0.3% of seats
Each party's share of the vote (outlined) and of the seats (filled)

The Gallagher index of disproportionality is 10.6 (0 when seats follow votes exactly); the effective number of parties is 4.5 by votes and 2.9 by seats; Union of the Democratic Centre led Spanish Socialist Workers' Party by 5.1 points of the vote.

Time and source Data as of