The 1991 Portuguese legislative election took place on 6 October. The election renewed all 230 members of the Assembly of the Republic. There was a reduction of 20 seats compared with previous elections, due to the 1989 Constitutional revision. For the first time in Portuguese democracy, an election was held after the four years of the legislature had been fully completed.
The Social Democratic Party, under the lead of Cavaco Silva, won a historic third term and obtained an absolute majority for a second consecutive time. While losing 13 MPs due to the reduction of the overall number from the original 250 to 230, it was just a 3 seat loss if the 1987 election results are tabulated with the new seat distribution, while gaining a higher share of the vote than in 1987. Cavaco Silva became the first Prime Minister since Hintze Ribeiro, in 1904, to lead a party into three successive democratic election victories.
The Socialist Party, at the time led by Jorge Sampaio, the future President of Portugal, increased its share by 7 percentage points and gained 12 MPs, a gain of 16 if compared with the new seat distribution, but did not manage to avoid the renewal of the Social Democrats' absolute majority. Like four and six years earlier, and like 1979 and 1980, the PS failed to win a single district. In the first legislative election after the fall of the Eastern Bloc, the communist dominated Democratic Unity Coalition lost much of its electoral influence, losing almost 10 MPs and 3 percentage points, but were able to hold on to the district of Beja by a slight margin over the PSD.
On the right, the CDS could not recover its past influence, mainly to the effect of tactical voting for the Social Democratic Party by right-wing voters, increasing its parliamentary group by only 1 MP. The National Solidarity Party, using a populist campaign, achieved for the first time an MP, in what would be the only presence of such party in the Parliament.
Voter turnout fell to 67.8 percent, and for the first time below 70 percent of the electorate.
Background
Leadership changes and challenges
Democratic Social Center
After CDS' poor results, just 4 percent in the 1987 general elections, then CDS leader Adriano Moreira announced he would leave the leadership and called a party congress to elect a new leader. Diogo Freitas do Amaral, former party leader and defeated candidate in the 1986 presidential election, decided to ran for the party's leadership, being the sole candidate on the ballot.
|- style="background-color:#E9E9E9"
! align="center" colspan=2 style="width: 60px"|Candidate
! align="center" style="width: 50px"|Votes
! align="center" style="width: 50px"|%
|-
|bgcolor=|
| align=left | Diogo Freitas do Amaral
| colspan="2" align=right | Voice vote
|-
|- style="background-color:#E9E9E9"
| colspan=2 style="text-align:left;" | Turnout
| align=right |
| align=right | 100.0
|-
| colspan="4" align=left|Source:
|}
Socialist Party
In the 1987 general election the PS polled 2nd with just 22 percent, while the PSD won a historic absolute majority. Then party leader, Vítor Constâncio was facing pressures because of his strategy, with interferences also from President Mário Soares, adding to this, his difficulty in finding a strong candidate for Lisbon to contest the 1989 local elections. Because of these pressures, Constâncio resign in late 1988 and a party congress to elect a new leader was called for mid January 1989. Two candidates were on the ballot, Jorge Sampaio and Jaime Gama. Sampaio was easily elected as PS leader.
|- style="background-color:#E9E9E9"
! align="center" colspan=2 style="width: 60px"|Candidate
! align="center" style="width: 50px"|Votes
! align="center" style="width: 50px"|%
|-
|bgcolor=|
| align=left | Jorge Sampaio
| align=right | 1,013
| align=right | 62.7
|-
|bgcolor=|
| align=left | Jaime Gama
| align=right | 561
| align=right | 34.7
|-
| colspan=2 align=left | Blank/Invalid ballots
| align=right | 42
| align=right | 2.6
|-
|- style="background-color:#E9E9E9"
| colspan=2 style="text-align:left;" | Turnout
| align=right |1,616
| align=center |
|-
| colspan="4" align=left|Source: Acção Socialista
|}
Democratic Renewal Party
The Democratic Renewal Party's results in the 1987 election were disappointing and António Ramalho Eanes resigned from the leadership. Hermínio Martinho returned to the leadership, but the party was plagued by deep divisions on its ideology and strategy, with key members, including Ramalho Eanes, announcing their departure from the party. In June 1991, the party held a leadership ballot between Hermínio Martinho and Pedro Canavarro. Martinho defended the dissolution of the party, while Canavarro proposed the continuation of the party. The ballot results gave Canavarro a landslide victory. The results were the following:
|- style="background-color:#E9E9E9"
! align="center" colspan=2 style="width: 60px"|Candidate
! align="center" style="width: 50px"|Votes
! align="center" style="width: 50px"|%
|-
|bgcolor=|
| align=left | Pedro Canavarro
| align=right | 145
| align=right | 79.2
|-
|bgcolor=|
| align=left | Hermínio Martinho
| align=right | 38
| align=right | 20.8
|-
|- style="background-color:#E9E9E9"
| colspan=2 style="text-align:left;" | Turnout
| align=right | 183
| align=center |
|-
| colspan="4" align=left|Source:
The number of seats assigned to each district depends on the district magnitude. The use of the d'Hondt method makes for a higher effective threshold than certain other allocation methods such as the Hare quota or Sainte-Laguë method, which are more generous to small parties.
For these elections, and compared with the 1987 elections, the MPs distributed by districts were the following:
{| class="wikitable"
|-
! District !! Number of MPs !! Map
|-
| Lisbon<sup></sup>|| style="text-align:center;"|50
| style="text-align:center;" rowspan="12"|
|-
| Porto<sup></sup>|| style="text-align:center;"| 37
|-
| Braga<sup></sup> and Setúbal<sup></sup> ||style="text-align:center;"| 16
|-
| Aveiro<sup></sup> ||style="text-align:center;"| 14
|-
| Leiria<sup></sup>, Santarém<sup></sup> and Coimbra<sup></sup> ||style="text-align:center;"| 10
|-
| Viseu<sup></sup> ||style="text-align:center;"| 9
|-
| Faro<sup></sup> ||style="text-align:center;"| 8
|-
| Vila Real and Viana do Castelo ||style="text-align:center;"| 6
|-
| Azores, Castelo Branco, Madeira ||style="text-align:center;"| 5
|-
| Beja<sup></sup>, Bragança, Évora and Guarda<sup></sup> ||style="text-align:center;"| 4
|-
| Portalegre ||style="text-align:center;"| 3
|-
| Europe and Outside Europe ||style="text-align:center;"| 2
|}
Parties
The table below lists the parties represented in the Assembly of the Republic during the 5th legislature (1987–1991) and that also partook in the election:
With the 1987 seat distribution
{| class="wikitable"
|-
! rowspan="2" colspan="3"| Name
! rowspan="2"| Ideology
! rowspan="2"| Political position
! rowspan="2"| Leader
! colspan="2"| 1987 result
! rowspan="2"| Seats at<br/>dissolution
|-
! %
! Seats
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PPD/PSD
| Social Democratic Party<br />
|
| Centre-right
| Aníbal<br/>Cavaco Silva
| style="text-align:center;"| 50.2%
|
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PS
| Socialist Party<br />
| Social democracy
| Centre-left
| Jorge Sampaio
| style="text-align:center;"| 22.2%
|
|
|-
| style="background:#f00;"|
| style="text-align:center;"| PCP
| Portuguese Communist Party<br />
| Communism<br />Marxism–Leninism
| Far-left
| Álvaro Cunhal
| rowspan="2" style="text-align:center;"|<br/>12.1%<br/>
|
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PEV
| Ecologist Party "The Greens"<br />
| Eco-socialism<br />Green politics
| Left-wing
| Isabel Castro
|
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PRD
| Democratic Renewal Party<br />
| Centrism<br />Third Way
|
| Pedro<br />Canavarro
| style="text-align:center;"| 4.9%
|
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| CDS
| Democratic and Social Centre<br />
| Christian democracy<br />Conservatism
|
| Diogo Freitas<br/>do Amaral
| style="text-align:center;"| 4.4%
|
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| Ind.
| Independent<br />
| colspan="5"|Ecologist Party "The Greens" caucus dissolved in December 1990;
|
|}
Seat changes
- On December 1990, the 7 MPs of the Democratic Renewal Party left the party and decided to join the Socialist Party caucus, after a split with the party's leader, Pedro Canavarro.
1987 results with the new seat distribution
{| class="wikitable"
|-
! rowspan="2" colspan="3"| Name
! rowspan="2"| Ideology
! rowspan="2"| Political position
! rowspan="2"| Leader
! colspan="2"| 1987 notional result
|-
! %
! Seats
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PPD/PSD
| Social Democratic Party<br />
|
| Centre-right
| Aníbal<br/>Cavaco Silva
| style="text-align:center;"| 50.2%
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PS
| Socialist Party<br />
| Social democracy
| Centre-left
| Jorge Sampaio
| style="text-align:center;"| 22.2%
|
|-
| style="background:#f00;"|
| style="text-align:center;"| PCP
| Portuguese Communist Party<br />
| Communism<br />Marxism–Leninism
| Far-left
| Álvaro Cunhal
| rowspan="2" style="text-align:center;"| 12.1%
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PEV
| Ecologist Party "The Greens"<br />
| Eco-socialism<br />Green politics
| Left-wing
| Isabel Castro
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| PRD
| Democratic Renewal Party<br />
| Centrism<br />Third Way
|
| Pedro<br />Canavarro
| style="text-align:center;"| 4.9%
|
|-
| style="color:inherit;background:;"|
| style="text-align:center;"| CDS
| Democratic and Social Centre<br />
| Christian democracy<br />Conservatism
|
| Diogo Freitas<br/>do Amaral
| style="text-align:center;"| 4.4%
|
|}
Campaign period
Party slogans
{| class="wikitable" style="font-size:97%; text-align:left;"
|-
! style="text-align:left;" colspan="2"| Party or alliance
! Original slogan
! English translation
! Refs
|-
| style="color:inherit;background:"|
| PSD
| « No bom caminho »
| "On the right track"
|
|-
| width="1" style="color:inherit;background:"|
| PS
| « Agora nós »
| "Now us."
|
|-
| style="color:inherit;background:"|
| CDU
| « Para um Portugal melhor »
| "For a better Portugal"
|
|-
| style="color:inherit;background:"|
| CDS
| « A verdade, sempre! »
| "The truth, always!"
|
|-
| style="color:inherit;background:#000080"|
| PSN
| « O sol está a nascer para todos. »
| "The sun is rising for everyone."
|
|}
Candidates' debates
No debates between the main parties were held as the PSD leader and Prime Minister, Aníbal Cavaco Silva, refused to take part in any debate.
Opinion polling
The following table shows the opinion polls of voting intention of the Portuguese voters before the election. Included is also the result of the Portuguese general elections in 1987 and 1991 for reference.
Note, until 2000, the publication of opinion polls in the last week of the campaign was forbidden.
{| class="wikitable sortable mw-datatable" style="text-align:center;font-size:95%;line-height:16px;"
|- style="height:42px;"
! style="width:150px;" rowspan="2"| Polling firm/Link
! style="width:145px;" rowspan="2"| Date Released
! class="unsortable" style="width:38px;"|38px|link=Social Democratic Party (Portugal)|PSD
! class="unsortable" style="width:38px;"|PS
! class="unsortable" style="width:35px;"|31px|link=Unitary Democratic Coalition|CDU
! class="unsortable" style="width:35px;"| 25px|link=CDS – People's Party|CDS
! class="unsortable" style="width:35px;"| 30px|link=National Solidarity Party (Portugal)|PSN
! class="unsortable" style="width:35px;" rowspan="2"|
! class="unsortable" style="width:30px;" rowspan="2"| Lead
|-
! style="color:inherit;background:;"|
! style="color:inherit;background:;"|
! style="color:inherit;background:;"|
! style="color:inherit;background:;"|
! style="color:inherit;background:#000080;" |
|-
| colspan="16" style="background:#A0A0A0"|
|- style="background:#EFEFEF;"
| align="center" | 1991 legislative election
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 50.6<br/>
| align="center" | 29.1<br/>
| align="center" | 8.8<br/>
| align="center" | 4.4<br/>
| align="center" | 1.7<br/>
| align="center" | 5.4<br/>
| style="background:#FF9900; color:white" | 21.5
|-
| colspan="16" style="background:#A0A0A0"|
|- style="background:#EAFFEA"|
| align="center" | UCP
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 48.0–51.9<br/>
| align="center" | 28.5–31.5<br/>
| align="center" | 7.5–10.0<br/>
| align="center" | 4.5–5.5<br/>
| ?<br/>
| align=center |
| style="background:#FF9900; color:white" | 19.5<br/>20.4
|- style="background:#EAFFEA"|
| align="center" | Euroexpansão
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 45.8–50.2
| align="center" | 29.8–33.9
| align="center" | 6.8–9.1
| align="center" | 3.7–5.5
| align="center" | 1.0–2.0
| align=center |
| style="background:#FF9900; color:white" | 16.0<br/>16.3
|- style="background:#EAFFEA"|
| align="center" | Euroteste
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 47–50
| align="center" | 31–34
| align="center" | 7.5–10
| align="center" | 4–5
| –
| align="center" |
| style="background:#FF9900; color:white" | 16
|- style="background:#EAFFEA"|
| align="center" | GEOIDEIA
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 49–52
| align="center" | 29–31
| align="center" | 7–9
| align="center" | 3–4
| align="center" | 2–3
| align=center |
| style="background:#FF9900; color:white" | 20<br/>21
|- style="background:#EAFFEA"|
| align="center" | Rádio Press
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 45.5
| align="center" | 35.0
| align="center" | 9.6
| align="center" | 4.5
| –
| align=center | —
| style="background:#FF9900; color:white" | 10.5
|- style="background:#EAFFEA"|
| align="center" | Rádio Correio da Manhã
| align="center" | 6 Oct 1991
| align="center" style="background:#FFD18D"| 45.8–50.2
| align="center" | 29.8–33.9
| align="center" | 6.8–9.1
| align="center" | 3.7–5.5
| align="center" | 1.0–2.0
| align=center |
| style="background:#FF9900; color:white" | 16.0<br/>16.3
|-
| align="center" | UCP
| align="center" | 29 Sep 1991
| align="center" style="background:#FFD18D"| 51.3<br/>
| align="center" | 29.3<br/>
| align="center" | 7.5<br/>
| align="center" | 5.0<br/>
|
| align="center" |7.0<br/>
| style="background:#FF9900; color:white" | 22.0
|-
| align="center" | Euroteste
| align="center" | 28 Sep 1991
| align="center" style="background:#FFD18D"| 47.3
| align="center" | 35.5
| align="center" | 8.5
| align="center" | 4.1
|
| align="center" |4.6
| style="background:#FF9900; color:white" | 11.8
|-
| align="center" | Euroteste
| align="center" | 28 Sep 1991
| align="center" style="background:#FFD18D"| 46.0
| align="center" | 37.0
| align="center" | 9.7
| align="center" | 3.9
|
| align="center" |3.4
| style="background:#FF9900; color:white" | 9.0
|-
| align="center" | Euroexpansão
| align="center" | 28 Sep 1991
| align="center" style="background:#FFD18D"| 44
| align="center" | 33
| align="center" | 9
| align="center" | 6
|
| align="center" |8
| style="background:#FF9900; color:white" | 11
|-
| align="center" | Marktest
| align="center" | 27 Sep 1991
| align="center" style="background:#FFD18D"| 43.1
| align="center" | 32.8
| align="center" | 7.7
| align="center" | 4.6
|
| align="center" |11.8
| style="background:#FF9900; color:white" | 10.3
|-
| align="center" | Pluriteste
| align="center" | 27 Sep 1991
| align="center" style="background:#FFD18D"| 41.2
| align="center" | 34.7
| align="center" | 8.4
| align="center" | 8.1
|
| align="center" |7.6
| style="background:#FF9900; color:white" | 6.5
|-
| align="center" | Euroteste
| align="center" | 20 Sep 1991
| align="center" style="background:#FFD18D"| 45.6
| align="center" | 35.5
| align="center" | 10.0
| align="center" | 4.4
|
| align="center" |4.5
| style="background:#FF9900; color:white" | 10.1
|-
| align="center" | Marktest
| align="center" | 20 Sep 1991
| align="center" style="background:#FFD18D"| 41.9
| align="center" | 31.9
| align="center" | 7.3
| align="center" | 4.4
|
| align="center" |14.5
| style="background:#FF9900; color:white" | 10.0
|-
| align="center" | Pluriteste
| align="center" | 16 Sep 1991
| align="center" style="background:#FFD18D"| 39.2
| align="center" | 26.6
| align="center" | 6.2
| align="center" | 6.0
|
| align="center" |22.0
| style="background:#FF9900; color:white" | 12.6
|-
| align="center" | Euroteste
| align="center" | 16 Sep 1991
| align="center" style="background:#FFD18D"| 45.1
| align="center" | 34.5
| align="center" | 10.2
| align="center" | 5.2
|
| align="center" |5.0
| style="background:#FF9900; color:white" | 10.6
|-
| align="center" | Norma
| align="center" | 14 Sep 1991
| align="center" style="background:#FFD18D"| 45.0
| align="center" | 37.5
| align="center" | 11.2
| align="center" | 3.5
|
| align="center" |2.8
| style="background:#FF9900; color:white" | 7.5
|-
| align="center" | Euroexpansão
| align="center" | 14 Sep 1991
| align="center" style="background:#FFD18D"| 44.7
| align="center" | 40.0
|
|
|
| align="center" | 15.3
| style="background:#FF9900; color:white" | 4.7
|-
| align="center" | Euroexpansão/Marktest
| align="center" | 28 Aug 1991
| align="center" | 35.3
| align="center" style="background:#FFCBFF"| 36.8
| align="center" | 8.7
| align="center" | 4.9
|
| align="center" |14.3
| style="background:#FF66FF; color:white" | 1.5
|-
| align="center" | DN/Renascença
| align="center" | 13 Aug 1991
| align="center" style="background:#FFD18D"| 46.5
| align="center" | 38.3
|
|
|
| align="center" | 15.2
| style="background:#FF9900; color:white" | 8.2
|-
| align="center" | DN/Renascença
| align="center" | 6 Aug 1991
| align="center" style="background:#FFD18D"| 44.8
| align="center" | 41.6
|
|
|
| align="center" | 13.6
| style="background:#FF9900; color:white" | 3.2
|-
| align="center" | Euroteste/JN
| align="center" | 4 Aug 1991
| align="center" style="background:#FFD18D"| 47.5
| align="center" | 37.8
| align="center" | 12.3
| align="center" | 8.2
|
|
| style="background:#FF9900; color:white" | 7.7
|-
| align="center" | PSD
| align="center" | 19 Jul 1991
| align="center" style="background:#FFD18D"| 54
| align="center" | ?
| align="center" | ?
| align="center" | ?
|
| align="center" | ?
| style="background:#FF9900; color:white" | ?
|-
| align="center" | PCP
| align="center" | 19 Jul 1991
| align="center" style="background:#FFD18D"| 52
| align="center" | ?
| align="center" | ?
| align="center" | ?
|
| align="center" | ?
| style="background:#FF9900; color:white" | ?
|-
| align="center" | Norma
| align="center" | 19 Jul 1991
| align="center" style="background:#FFD18D"| 43.7
| align="center" | 32.9
| align="center" | 12.4
| align="center" | 6.5
|
| align="center" |4.5
| style="background:#FF9900; color:white" | 10.8
|-
| align="center" | Euroteste
| align="center" | 19 Jul 1991
| align="center" style="background:#FFD18D"| 45.4
| align="center" | 36.6
| align="center" | 10.8
| align="center" | 4.0
|
| align="center" |3.2
| style="background:#FF9900; color:white" | 8.8
|-
| align="center" | Euroteste
| align="center" | 13 Jan 1991
| align="center" style="background:#FFD18D"| 47.5
| align="center" | 36.9
| align="center" | 9.3
| align="center" | 3.5
|
| align="center" | 2.7
| style="background:#FF9900; color:white" | 10.6
|- style="background:#EFEFEF;"
| 1989 local elections
| 17 Dec 1989
| align="center" | 35.3
| align="center" style="background:#FFCBFF"| 36.7
| align="center" | 13.3
| align="center" | 9.1
|
| align="center" | 5.6
| style="background:#FF66FF; color:white" | 1.4
|-
| align="center" | Norma
| align="center" | 29 Oct 1989
| align="center" style="background:#FFD18D"| 41.3
| align="center" | 31.4
| align="center" | 14.4
| align="center" | 3.4
|
| align="center" | 9.5
| style="background:#FF9900; color:white" | 9.9
|- style="background:#EFEFEF;"
| 1989 EP elections
| 18 Jun 1989
| align="center" style="background:#FFD18D"| 32.8
| align="center" | 28.5
| align="center" | 14.4
| align="center" | 14.2
|
| align="center" | 10.1
| style="background:#FF9900; color:white" | 4.3
|-
| align="center" | Euroexpansão
| align="center" | 18 Jun 1988
| align="center" style="background:#FFD18D"| 38.5
| align="center" | ?
| align="center" | ?
| align="center" | ?
|
| align="center" | ?
| style="background:#FF9900; color:white" | ?
|-
| colspan="10" style="background:#A0A0A0"|
|- style="background:#EFEFEF;"
| align="center" | 1987 legislative election
| align="center" | 19 Jul 1987
| align="center" style="background:#FFD18D"| 50.2<br/>
| align="center" | 22.2<br/>
| align="center" | 12.1<br/>
| align="center" | 4.4<br/>
|
| align="center" | 11.1<br/>
| style="background:#FF9900; color:white" | 28.0
|-
| colspan="10" style="background:#A0A0A0"|
|}
Results
National summary
Distribution by constituency
|- class="unsortable"
!rowspan=2|Constituency!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S
!rowspan=2|Total<br />S
|- class="unsortable" style="text-align:center;"
!colspan=2 | PSD
!colspan=2 | PS
!colspan=2 | CDU
!colspan=2 | CDS
!colspan=2 | PSN
|-
| style="text-align:left;" | Azores
| style="background:; color:white;"|64.1
| 4
| 25.8
| 1
| 1.3
| -
| 3.4
| -
|colspan="2" bgcolor="#AAAAAA"|
| 5
|-
| style="text-align:left;" | Aveiro
| style="background:; color:white;"|58.6
| 9
| 27.8
| 4
| 2.8
| -
| 6.1
| 1
| 1.3
| -
| 14
|-
| style="text-align:left;" | Beja
| 29.3
| 1
| 28.4
| 1
| style="background:red; color:white;"|30.4
| 2
| 2.3
| -
| 1.0
| -
| 4
|-
| style="text-align:left;" | Braga
| style="background:; color:white;"|53.6
| 10
| 31.5
| 5
| 4.6
| -
| 5.6
| 1
| 0.8
| -
| 16
|-
| style="text-align:left;" | Bragança
| style="background:; color:white;"|57.9
| 3
| 25.7
| 1
| 2.1
| -
| 8.2
| -
| 1.5
| -
| 4
|-
| style="text-align:left;" | Castelo Branco
| style="background:; color:white;"|51.8
| 3
| 32.4
| 2
| 4.6
| -
| 3.9
| -
| 2.3
| -
| 5
|-
| style="text-align:left;" | Coimbra
| style="background:; color:white;"|49.9
| 6
| 34.4
| 4
| 5.0
| -
| 3.5
| -
| 1.7
| -
| 10
|-
| style="text-align:left;" | Évora
| style="background:; color:white;"|35.0
| 2
| 25.9
| 1
| 27.1
| 1
| 2.8
| -
| 1.4
| -
| 4
|-
| style="text-align:left;" | Faro
| style="background:; color:white;"|50.8
| 5
| 31.2
| 3
| 7.2
| -
| 2.8
| -
| 2.2
| -
| 8
|-
| style="text-align:left;" | Guarda
| style="background:; color:white;"|58.6
| 3
| 26.8
| 1
| 2.3
| -
| 5.9
| -
| 1.3
| -
| 4
|-
| style="text-align:left;" | Leiria
| style="background:; color:white;"|61.2
| 7
| 23.0
| 3
| 4.5
| -
| 4.8
| -
| 1.4
| -
| 10
|-
| style="text-align:left;" | Lisbon
| style="background:; color:white;"|45.3
| 25
| 29.7
| 16
| 12.2
| 6
| 4.0
| 2
| 2.6
| 1
| 50
|-
| style="text-align:left;" | Madeira
| style="background:; color:white;"|62.4
| 4
| 20.2
| 1
| 1.0
| -
| 6.1
| -
| 1.9
| -
| 5
|-
| style="text-align:left;" | Portalegre
| style="background:; color:white;"|38.9
| 2
| 33.5
| 1
| 15.2
| -
| 3.3
| -
| 1.8
| -
| 3
|-
| style="text-align:left;" | Porto
| style="background:; color:white;"|51.3
| 21
| 32.9
| 13
| 6.4
| 2
| 4.1
| 1
| 1.1
| -
| 37
|-
| style="text-align:left;" | Santarém
| style="background:; color:white;"|49.1
| 6
| 29.4
| 3
| 9.8
| 1
| 3.3
| -
| 2.2
| -
| 10
|-
| style="text-align:left;" | Setúbal
| style="background:; color:white;"|34.7
| 6
| 28.4
| 5
| 24.9
| 5
| 2.7
| -
| 2.4
| -
| 16
|-
| style="text-align:left;" | Viana do Castelo
| style="background:; color:white;"|56.9
| 4
| 25.2
| 2
| 5.0
| -
| 7.2
| -
| 1.2
| -
| 6
|-
| style="text-align:left;" | Vila Real
| style="background:; color:white;"|60.6
| 4
| 26.0
| 2
| 2.6
| -
| 5.1
| -
| 1.2
| -
| 6
|-
| style="text-align:left;" | Viseu
| style="background:; color:white;"|64.3
| 7
| 19.4
| 2
| 2.1
| -
| 6.3
| -
| 1.3
| -
| 9
|-
| style="text-align:left;" | Europe
| style="background:; color:white;"|53.7
| 1
| 31.9
| 1
| 7.8
| -
| 3.0
| -
|colspan="2" rowspan="2" bgcolor="#AAAAAA"|
| 2
|-
| style="text-align:left;" | Outside Europe
| style="background:; color:white;"|77.3
| 2
| 4.9
| -
| 1.0
| -
| 14.6
| -
| 2
|-
|- class="unsortable" style="background:#E9E9E9"
| style="text-align:left;" | Total
| style="background:; color:white;"|50.6
| 135
| 29.1
| 72
| 8.8
| 17
| 4.4
| 5
| 1.7
| 1
| 230
|-
| colspan=12 style="text-align:left;" | Source: Comissão Nacional de Eleições
|}
Maps
<gallery mode="packed" heights="270">
File:1991 Portuguese legislative election district results.svg|Winner and seats by constituency.
File:Legislativas portuguesas de 1991 (Mapa).png|Most voted political force by municipality.
</gallery>
See also
- Politics of Portugal
- List of political parties in Portugal
- Elections in Portugal
Notes
References
External links
- Comissão Nacional de Eleições
- Centro de Estudos do Pensamento Político