 
Same-sex marriage has been legal in Portugal since 5 June 2010. The XVIII Constitutional Government of Portugal under Prime Minister José Sócrates introduced a bill for legalization in December 2009. It was passed by the Assembly of the Republic in February 2010, and was declared legally valid by the Portuguese Constitutional Court in April 2010. On 17 May 2010, President Aníbal Cavaco Silva ratified the law, making Portugal the sixth country in Europe and the eighth in the world to allow same-sex marriage nationwide. The law was published in the "Diário da República" on 31 May and became effective on 5 June 2010. Polling suggests that a significant majority of Portuguese people support the legal recognition of same-sex marriage.
Portugal has also recognized same-sex "de facto" unions, providing several of the rights and benefits of marriage, since 2001.
Background.
"De facto" unions.
A "de facto" union (, ; ) is a legally recognised union, providing couples, opposite-sex or same-sex, with similar rights and benefits as marriage. Same-sex "de facto" unions were established by "Law no. 7/2001" ("Lei n.º 7/2001") in 2001.
Constitutional Court ruling.
On 1 February 2006, a lesbian couple applied for a marriage licence. Their application was refused, but the couple, Teresa Pires and Helena Paixão, promised to challenge the ban in court, saying that it discriminated against them on the basis of their sexual orientation. Discrimination based on sexual orientation is illegal under the Constitution of Portugal. In May 2007, a lower court rejected the motion, and the couple appealed to the Portuguese Constitutional Court. The Constitutional Court received the case in July 2007. Pires and Paixão's lawyer, Luís Grave Rodrigues, presented their arguments on 19 October 2007, including seven legal opinions ("pareceres") from Portuguese professors of law arguing that the ban on same-sex marriage was unconstitutional.
On 9 July 2009, the Constitutional Court decided on a 3–2 vote that the Constitution did not demand the recognition of same-sex marriage, but also did not oppose it, and that the decision had to be made by the Assembly of the Republic.
Legislative action.
2008 bills.
Two bills to legalize same-sex marriage were presented to Parliament on 10 October 2008. The bills were introduced separately by the Left Bloc (BE) and the Green Party (PEV). Both bills were rejected by Parliament on opposition from the governing Socialist Party (PS) and the main opposition Social Democratic Party (PSD).
Passage of legislation in 2010.
Prime Minister José Sócrates said on 18 January 2009 that, if re-elected in the September 2009 elections, he planned to introduce a bill to grant same-sex couples the right to marry. While the bill did not contemplate adoption, most LGBT organizations in Portugal supported the measure as an important step. In March 2009, Jorge Lacão, the Secretary of State for the Presidency of the Council of Ministers, confirmed that the Socialist government intended to legalize same-sex marriage if re-elected in 2009. Manuela Ferreira Leite, the leader of the conservative Social Democratic Party, expressed her opposition to the recognition of same-sex marriage.
In May 2009, a grassroots movement, the Movement for Equality in Access to Civil Marriage (), was formed to campaign for the proposed same-sex marriage law. It attracted the support of several Portuguese celebrities, including Nobel Prize winner José Saramago and the Mayor of Lisbon, António Costa. In October 2009, the newly re-elected Sócrates made an assurance that the Socialist Party would move ahead with its campaign promise of legalizing same-sex marriage. The proposition received strong support from the Left Bloc, with its parliamentary leader, Francisco Louçã, presenting his own bill to legalize same-sex marriage. In mid-October 2009, Lacão said it was likely that same-sex marriage would be legalised in early 2010. On 3 November 2009, José Ribeiro e Castro, a deputy from the CDS – People's Party, called for a referendum but the Prime Minister, the Socialist Party and the Left Bloc rejected the idea.
On 4 November 2009, Francisco Assis, the parliamentary leader of the Socialist Party, said that the same-sex marriage bill would be voted on soon and confirmed that the bill would not allow same-sex couples to adopt children. The government gave its official approval to the same-sex marriage bill on 17 December 2009. On 8 January 2010, after a debate which included the intervention of Prime Minister Sócrates, the Assembly of the Republic passed the bill in first reading by 126 votes to 97, and rejected bills introduced by the Left Bloc and the Green Party, as well as a measure to create civil unions submitted by the PSD. The Constitutional Affairs Committee approved the bill on 10 February, and it passed its final parliamentary vote on 11 February. The legislation was sent to President Aníbal Cavaco Silva on 24 February 2010.
On 13 March 2010, Cavaco Silva asked the Constitutional Court to verify whether the bill was constitutional. On 8 April 2010, the Constitutional Court ruled (11–2) for the constitutionality of the bill, with three members concluding that the Constitution requires the recognition of same-sex marriages. The ruling was published in the official gazette on 28 April, giving the President twenty days to sign, or veto, the bill. On 17 May 2010, Cavaco Silva signed the bill into law. The law was published in the "Diário da República" on 31 May and became effective on 5 June 2010. On 7 June, Teresa Pires and Helena Paixão, the couple who had originally challenged the same-sex marriage ban in court in 2006, became the first same-sex couple to marry in Portugal, exchanging vows at the registry office in Lisbon. The first same-sex marriage in the Azores was performed on 29 August 2010 on Terceira.
Article 1577 of the Portuguese Civil Code was amended to read: "Marriage is a contract between two persons who intend to found a family through a full communion of life, in accordance with the provisions of this Code."
Adoption bills.
On 24 February 2012, Parliament rejected two bills which would have allowed married same-sex couples to adopt children. On 17 May 2013, Parliament rejected a bill to allow same-sex couples to adopt children in a 104–77 vote. That same day, Parliament approved a bill in first reading to allow married same-sex couples to adopt their partner's children (i.e. stepchild adoption). However, that bill was rejected in second reading on 14 March 2014 in a 107–112 vote.
On 17 January 2014, Parliament approved a resolution to hold a referendum on adoption rights for same-sex couples. On 28 January, President Cavaco Silva asked the Constitutional Court to verify whether the resolution was constitutional. The court declared the resolution unconstitutional on 19 February 2014, and Cavaco Silva vetoed it the following day.
On 20 November 2015, Parliament approved 5 bills in first reading granting adoption rights to same-sex spouses. The bills were immediately sent to the Committee for Constitutional Affairs, Rights, Freedoms and Guarantees. On 16 December, the committee merged the bills into one project and voted for its approval. On 18 December, the bill was approved by Parliament in its second, final vote. President Cavaco Silva vetoed the bill on 23 January 2016, with the decision being announced publicly on 25 January. On 10 February 2016, the veto was overridden by Parliament. The law was published in the official journal on 29 February, and took effect the first day of the first month after publication (i.e. 1 March 2016).
Marriage statistics.
By June 2011, one year after the law had come into force, approximately 380 same-sex marriages had taken place in Portugal.
Figures for 2020 are lower than previous years because of the restrictions in place due to the COVID-19 pandemic.
Religious performance.
Most religious denominations in Portugal do not support same-sex marriage and do not allow their clergy to bless or officiate at marriages of same-sex couples. The Catholic Church was opposed to the law and, while Portugal is a constitutional secular country, its status as a historically Catholic country was also a reason for the media sensationalism which heightened the controversy over the law. On 13 May 2010, during an official visit to Portugal four days before the ratification of the law, Pope Benedict XVI affirmed his opposition to same-sex marriage, describing it as "insidious and dangerous". A few months earlier, 5,000 people had demonstrated against the legalization of same-sex marriage in a march in Lisbon. In December 2023, the Holy See published "Fiducia supplicans", a declaration allowing Catholic priests to bless couples who are not considered to be married according to church teaching, including the blessing of same-sex couples. The Portuguese Episcopal Conference welcomed the declaration. In September 2024, Father João Emanuel Pereir blessed a same-sex couple in Porto, which caused some controversy in Catholic circles.
Some smaller Christian denominations also do not permit their clergy to solemnise or bless same-sex unions, including the Evangelical Presbyterian Church in Portugal, the Portuguese Evangelical Lutheran Church, and the Lusitanian Catholic Apostolic Evangelical Church.
Marriage norms.
On 19 July 2010, the Institute of Registries and Notary () published the following rules on marriage:
Public opinion.
The 2015 Eurobarometer found that 61% of Portuguese people thought same-sex marriage should be allowed throughout Europe, while 33% were opposed.
A Pew Research Center poll, conducted between April and August 2017 and published in May 2018, showed that 59% of Portuguese people supported same-sex marriage, 28% were opposed and 13% did not know or had refused to answer. When divided by religion, 82% of religiously unaffiliated people, 64% of non-practicing Christians and 43% of church-attending Christians supported same-sex marriage. Opposition was 14% among 18–34-year-olds.
The 2019 Eurobarometer found that 74% of Portuguese people thought same-sex marriage should be allowed throughout Europe, while 20% were opposed. A 2023 Ipsos poll showed that 80% of Portuguese people supported same-sex marriage, while 11% supported civil unions or other types of partnerships but not marriage, 5% were undecided and 4% were opposed to all recognition for same-sex couples. The 2023 Eurobarometer showed that support had increased to 81%, while 14% were opposed. The survey also found that 73% of Portuguese people thought that "there is nothing wrong in a sexual relationship between two persons of the same sex", while 23% disagreed.
References.
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