2017 French presidential election in the context of "Opinion polling for the 2017 French presidential election"

Legislative elections were held in France on 11 and 18 June 2017 (with different dates for voters overseas) to elect the 577 members of the 15th National Assembly of the Fifth Republic. They followed the two-round presidential election won by Emmanuel Macron. The centrist party he founded in 2016, La République En Marche! (LREM), led an alliance with the centrist Democratic Movement (MoDem); together, the two parties won 350 of the 577 seats—a substantial majority—in the National Assembly, including an outright majority of 308 seats for LREM. The Socialist Party (PS) was reduced to 30 seats and the Republicans (LR) reduced to 112 seats, and both parties' allies also suffered from a marked drop in support; these were the lowest-ever scores for the centre-left and centre-right in the legislative elections. The movement founded by Jean-Luc Mélenchon, la France Insoumise (FI), secured 17 seats, enough for a group in the National Assembly. Among other major parties, the French Communist Party (PCF) secured ten and the National Front (FN) obtained eight seats. Both rounds of the legislative election were marked by record low turnout.

In total, 206 MPs lost reelection, and 424 (75%) elected MPs were new members. There was a record number of women elected. The average age of parliamentarians decreased from 54 to 48. Ludovic Pajot from the National Rally became the new Baby of the House, being elected at the age of 23. Édouard Philippe, appointed as Prime Minister by Macron following his victory in the presidential election, was reappointed following the second round of the legislative elections and presented his second government by 21 June. The 15th legislature of the French Fifth Republic commenced on 27 June.

The Radical Party of the Left (French: Parti radical de gauche [paʁti ʁadikal də ɡoʃ], PRG) is a social-liberal political party in France. A party in the Radical tradition, since 1972 the PRG has been a close ally of the major party of the centre-left in France, the Socialist Party (French: Parti socialiste, PS). After the 2017 presidential and legislative elections, negotiations to merge the PRG with the Radical Party (from which the PRG emerged in 1972) began and the refounding congress to reunite the parties into the Radical Movement was held on 9 and 10 December 2017. However, a faction of ex-PRG members, including its last president Sylvia Pinel, split from the Radical Movement in February 2019 due to its expected alliance with La République En Marche in the European elections and resurrected the PRG.

The Republicans (French: Les Républicains [le ʁepyblikɛ̃], LR) is a liberal-conservative political party in France, largely inspired by the tradition of Gaullism. The party was formed in 2015 as the refoundation of the Union for a Popular Movement (UMP), which had been established in 2002 under the leadership of the then-president of France, Jacques Chirac. LR is a member of the Centrist Democrat International and the European People's Party, and sits in the European People's Party Group in the European Parliament.

The UMP used to be one of the two major political parties in the Fifth Republic, along with the centre-left Socialist Party, before being eclipsed by the National Rally and Renaissance. The LR candidate in the 2017 presidential election, former Prime Minister François Fillon, placed third in the first round, with 20.0% of the vote. Following the 2017 legislative election, LR became the second-largest party in the National Assembly, behind President Emmanuel Macron's La République En Marche! party (later renamed Renaissance). After a disappointing result in the 2019 European Parliament election, party leader Laurent Wauquiez resigned. He was replaced by Christian Jacob, who remained in office until after the 2022 legislative election, which saw LR lose half of its seats, although it became the kingmaker in a hung parliament. One month before, in the 2022 presidential election, LR nominee Valérie Pécresse placed fifth with 4.7% of the vote. Despite those setbacks, LR was still the largest party in the Senate and headed a plurality of regions of France. Éric Ciotti became president of LR after the 2022 leadership election. In the run-up of the 2024 French legislative election Ciotti came out in favour of an electoral alliance with National Rally. This would have reversed the historic cordon sanitaire that the party had regarding the group. Ciotti was soon removed from his position, which led to a leadership crisis. In May 2025, Bruno Retailleau was elected president of the party.

The Radical Party (French: Parti radical, pronounced [paʁti ʁadikal]), officially the Republican, Radical and Radical-Socialist Party (Parti républicain, radical et radical-socialiste [paʁti ʁepyblikɛ̃ ʁadikal e ʁadikal sɔsjalist]), is a liberal and social-liberal political party in France. Since 1971, to prevent confusion with the Radical Party of the Left (PRG), it has also been referred to as Parti radical valoisien, after its headquarters on the rue de Valois. The party's name has been variously abbreviated to PRRRS, Rad, PR and PRV. Founded in 1901, the PR is the oldest active political party in France.

Coming from the Radical Republican tradition, the PR upheld the principles of private property, social justice and secularism. The Radicals were originally a left-wing group, but, starting with the emergence of the French Section of the Workers' International (SFIO) in 1905, they shifted gradually towards the centre. In 1926, its right-wing split off to form the Unionist (or National) Radicals. In 1971 the party's left-wing split off to form the PRG. The PR then affiliated with the centre-right, becoming one of the founder parties of the Union for French Democracy (UDF) in 1978. The party split from the UDF in 2002 in order to become an associate party of the Union for a Popular Movement (UMP). It was later represented on the Liaison Committee for the Presidential Majority prior to launching The Alliance (ARES) in 2011 and the Union of Democrats and Independents (UDI) in 2012. After the 2017 presidential and legislative elections, negotiations to merge the PR and the PRG began. The refounding congress to reunite the parties into the Radical Movement was held in December 2017. However, the union proved short-lived and, by 2021, both the PR and PRG returned to be independent parties. The PR has then been part of the Ensemble coalition.

Renaissance (RE) is a political party in France that is typically described as liberal and centrist or centre-right. The party was originally known as En Marche ! (EM) and later La République En Marche ! (transl. The Republic on the Move, LREM, LaREM or REM), before adopting its current name in September 2022. RE is the leading force of the centrist Ensemble coalition, coalesced around Emmanuel Macron's original presidential majority.

The party was established on 6 April 2016 by Macron, a former Minister of the Economy, Industry and Digital Affairs, who was later elected president in the 2017 presidential election with 66.1% of the second-round vote. Subsequently, the party ran candidates in the 2017 legislative election, including dissidents from the Socialist Party (PS) and the Republicans (LR), as well as minor parties, winning an absolute majority in the National Assembly. Macron was re-elected in the 2022 presidential election, but the party lost its absolute majority in the 2022 legislative election.

Renaissance (RE) is a political party in France that is typically described as liberal and centrist or centre-right. The party was originally known as En Marche ! (EM) and later La République En Marche ! (transl. The Republic on the Move), LREM, LaREM or REM), before adopting its current name in September 2022. RE is the leading force of the centrist Ensemble coalition, coalesced around Emmanuel Macron's original presidential majority.

The party was established on 6 April 2016 by Macron, a former Minister of the Economy, Industry and Digital Affairs, who was later elected president in the 2017 presidential election with 66.1% of the second-round vote. Subsequently, the party ran candidates in the 2017 legislative election, including dissidents from the Socialist Party (PS) and the Republicans (LR), as well as minor parties, winning an absolute majority in the National Assembly. Macron was re-elected in the 2022 presidential election, but the party lost its absolute majority in the 2022 legislative election.

Jean-Luc Antoine Pierre Mélenchon (French: [ʒɑ̃lyk melɑ̃ʃɔ̃] ; born 19 August 1951) is a French politician who has been the de facto leader of the movement La France Insoumise (LFI) since it was established in 2016. He was the deputy in the National Assembly for the 4th constituency of Bouches-du-Rhône from 2017 to 2022 and led the La France Insoumise group in the National Assembly from 2017 to 2021. Mélenchon was previously elected as a Member of the European Parliament (MEP) in 2009 and reelected in 2014. He has run for President of France three times, in 2012, 2017 and 2022. In 2022, he came within 1.2 percentage points of reaching the second round in France's two-round voting system.

After joining the Socialist Party (PS) in 1976, Mélenchon was successively elected a municipal councillor of Massy (1983) and general councillor of Essonne (1985). In 1986, he entered the Senate, to which he was reelected in 1995 and 2004. He also served as Minister for Vocational Education between 2000 and 2002 under Minister of National Education Jack Lang in the cohabitation government of Lionel Jospin. He was part of the left-wing of the PS until the Reims Congress of November 2008, when he left the party to found the Left Party with Marc Dolez, a member of the National Assembly. Mélenchon first served as party president before becoming party co-president alongside Martine Billard, a position he held until 2014. As co-president of the Left Party, he joined the electoral coalition of the Left Front before the 2009 European Parliament election in France; he was elected as a MEP in the South-West France constituency and reelected in 2014. He became the Left Front's candidate in the 2012 French presidential election, in which he came in fourth, receiving 11.1% of the first-round vote.

La France Insoumise (LFI or FI; [la fʁɑ̃s ɛ̃sumiz], lit. 'France Unbowed' or 'France in Revolt') is a left-wing political party in France. It was launched in 2016 by Jean-Luc Mélenchon, then a Member of the European Parliament (MEP) and former co-president of the Left Party (PG). It aims to implement the eco-socialist and democratic socialist programme L'Avenir en commun (transl. A Shared Future).

The party nominated Mélenchon as its candidate for the 2017 French presidential election. He came fourth in the first round, receiving 19.6% of the vote and failing to qualify for the second round by around 2%. After the 2017 French legislative election, it formed a parliamentary group of 17 members of the National Assembly, with Mélenchon as the group's president. In the 2019 European Parliament election in France, it won six seats, below its expectations.

Stéphane Séjourné ([stefan seʒuʁne] ; born 26 March 1985) is a French politician of Renaissance who currently serves as Executive Vice-President of the European Commission for Prosperity and Industrial Strategy. He served as Minister for Europe and Foreign Affairs in the government of Prime Minister Gabriel Attal, his former domestic partner, between January and September 2024.

Séjourné was a Member of the European Parliament (MEP) in 2019, where he led Renew Europe, a liberal pro-European parliamentary group, from 2021 to 2024. He was an adviser to Emmanuel Macron during his ministerial tenure and advised him during his 2017 French presidential election campaign. In 2022, he became general secretary of Renaissance.