2018 Mayotte's 1st constituency by-election

2018 Mayotte's 1st constituency by-election

← 2017 18 March 2018 (first round) 25 March 2018 (second round) 2022 →
Turnout	30.39% 11.90% (first round) 41.36% 4.15% (second round)
Nominee Ramlati Ali Elad Chakrina Bacar Ali Boto Party DVG LR DVG 1st round % 3,875 36.15% 19.31% 3,493 32.59% 15.83% 1,338 12.48% 3.14% 2nd round % 8,246 54.77% 4.60% 6,810 45.23% 4.60% Eliminated   Nominee Daniel Zaïdani Party DVD 1st round % 1,305 12.17% 1.22% 2nd round % Eliminated
Deputy before election Ramlati Ali LREM Elected deputy Ramlati Ali DVG

A by-election was held in Mayotte's 1st constituency on 18 March 2018, with a second round on 25 March 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 Ramlati Ali, candidate of the Socialist Party (PS) in the June 2017 legislative elections and member of the La République En Marche group in the National Assembly, on 19 January 2018.

In the second round on 25 March, Ali was re-elected with 54.99% of the vote.