electionstracker

Portugal 2005 legislative election

What was the result of the 2005 legislative election in Portugal?

Socialist Party won 121 of 230 seats with 46.4% of the vote. 64.3% of registered voters cast a ballot.

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

Which party won the most seats?

Final results from ParlGov, read : Socialist Party won 121 of 230 seats with 46.4% of the vote; 64.3% of registered voters cast a ballot, up 2.8 points on 2002.

  • Socialist Party 121 +25 seats 46.4% +7.8 points
  • Social Democratic Party 75 −30 seats 29.6% −11.4 points
  • Unitary Democratic Coalition 0 0 seats 7.8% +0.7 points
  • CDS – People's Party 12 −2 seats 7.5% −1.4 points
  • Left Bloc 8 +5 seats 6.5% +3.8 points
  • Portuguese Workers' Communist Party 0 0 seats 0.9% +0.2 points
  • Portuguese Communist Party 12 +2 seats
  • Ecology Party -- Greens 2 0 seats
  • Seats won
  • Change on the previous election at the right
  • Share of the vote
  • Share at the previous election
  • Change in points at the right

Changes are against the Portugal 2002 legislative election, party by party.

116 of 230 seats make a majority

Key numbers

  1. 46.4%

    Share of the vote won by Socialist Party

    Socialist Party won 121 of 230 seats. A majority needs 116.

  2. +25 seats

    Seats gained by Socialist Party

    The largest gain in seats compared with 2002. Social Democratic Party lost 30 seats.

  3. 64.3%

    Voter turnout

    Up 2.8 points on 2002.

Seats and votes by party

PartySeats± seats%± pointsVotes
Socialist Party121+2546.4+7.82,588,312
Social Democratic Party75−3029.6−11.41,653,425
Unitary Democratic Coalitionwith Democratic Intervention007.8+0.7433,369
CDS – People's Party12−27.5−1.4416,415
Left Bloc8+56.5+3.8364,971
Portuguese Workers' Communist Party000.9+0.248,186
Portuguese Communist Party12+2
Ecology Party -- Greens20

± is the change against the Portugal 2002 legislative election, party by party.

Votes by party
  • Socialist Party 2,588,312
  • Social Democratic Party 1,653,425
  • Unitary Democratic Coalition 433,369
  • CDS – People's Party 416,415
  • Left Bloc 364,971
  • Portuguese Workers' Communist Party 48,186
  • Portuguese Communist Party
  • Ecology Party -- Greens

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?

64.3% of the 8,944,508 registered voters cast a ballot (5,747,834 ballots), up 2.8 points on 2002. 5,578,782 of them were valid votes. The highest turnout since 1995 in our data.

How do the votes compare with the seats?

  • Socialist Party46.4% of votes52.6% of seats
  • Social Democratic Party29.6% of votes32.6% of seats
  • CDS – People's Party7.5% of votes5.2% of seats
  • Left Bloc6.5% of votes3.5% of seats
  • Unitary Democratic Coalition7.8% of votes0.0% of seats
Each party's share of the vote (outlined) and of the seats (filled)

The Gallagher index of disproportionality is 8.7 (0 when seats follow votes exactly); the effective number of parties is 3.1 by votes and 2.6 by seats; Socialist Party led Social Democratic Party by 16.8 points of the vote.

Time and source Data as of