By-elections to the French National Assembly are held within three months after the invalidation of the election or resignation of a deputy. These by-elections were held during the 17th legislature of the French Fifth Republic.

List #Outgoing MPPartyEnd date of mandate ConstituencyDates of the new electionElected or re-elected MPPartyReason1Flavien Termet 5 October 2024Ardennes's 1st constituency1 and 8 December 2024Lionel VuibertResignation for health reasons2Hugo Prevost 15 October 2024Isère's 1st constituency12 and 19 January 2025Camille Galliard-MinierResignation after sexual assault allegations3Stéphane Séjourné30 November 2024https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000050691154Hauts-de-Seine's 9th constituency2 and 9 February 2025Élisabeth de MaistreNominated to the European Commission4Marie-Christine DallozLR13 February 2025Jura's 2nd constituency30 March and 6 April 2025Marie-Christine DallozLRCancellation following the presence of a candidate under guardianship in the second round5Arnaud SanvertRN7 March 2025Saône-et-Loire's 5th constituency18 and 25 May 2025Sébastien MartinLRCancellation due to irregularities in the first round6Jean Laussucq11 July 2025Paris's 2nd constituency21 and 28 September 2025Michel BarnierLRCancellation due to accounting irregularities during his campaign and declared ineligible7Brigitte BarègesUDR11 July 2025Tarn-et-Garonne's 1st constituency5 and 12 October 2025Pierre-Henri Carbonnel UDRCancellation due to accounting irregularities during her campaign and declared ineligible8Stéphane Vojetta11 July 2025Fifth French legislative constituency for citizens abroad28 September and 12 October 2025Nathalie CoggiaCancellation due to accounting irregularities during his campaign and declared ineligible9Stéphanie Rist10 October 2025Loiret's 1st constituency18 and 25 January 2026Stéphanie RistRe-elected after Stéphane Chouin resigned shortly to remain as a mayor of Saint-Hilaire-Saint-Mesmin10Christelle Petex-LevetLR6 November 2025Haute-Savoie's 3rd constituency25 January and 1 February 2026Antoine Valentin UDRResignation for personal reasons

See also

List of by-elections to the National Assembly (France)

References