2018 French residents overseas' 5th constituency by-election

French residents overseas' 5th constituency, 2018

← 2017 8 April 2018 (first round) 22 April 2018 (second round) 2022 →
Turnout	7.87% 8.07% (first round) 7.97% 5.57% (first round)
Nominee Samantha Cazebonne François Ralle-Andreoli Raphaël Chambat Party LREM LFI LR 1st round % 2,398 35.15% 15.21% 1,941 28.45% 12.93% 952 13.95% 1.15% 2nd round % 3,623 53.96% 12.25% 3,091 46.04% 12.25% Eliminated   Nominee Jean-Laurent Poitevin Mehdi Benlahcen Party DVD PS 1st round % 511 7.49% 7.49% 510 7.47% 0.66% 2nd round % Eliminated Eliminated
Deputy before election Samantha Cazebonne LREM Elected deputy Samantha Cazebonne LREM

A by-election was held in the fifth constituency for French residents overseas on 8 April 2018, with a second round on 22 April as no candidate secured a majority of votes in the first round. The by-election was called after the Constitutional Council invalidated the election of Samantha Cazebonne, candidate of La République En Marche! in the June 2017 legislative elections, on 2 February 2018. Cazebonne was re-elected in the second round on 22 April 2018, albeit with a reduced margin compared to June 2017.