2018 Essonne's 1st constituency by-election
18 November 2018 (first round)
25 November 2018 (second round) | |||||||||||||||||||||||||||||||||||||||||||||
| Turnout | 18.09% 22.02% (first round) 17.06% 19.49% (second round) | ||||||||||||||||||||||||||||||||||||||||||||
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A by-election was held in Essonne's 1st constituency on 18 November 2018, with a second round on 25 November as no candidate secured a majority of votes in the first round. The by-election was prompted by the resignation of Manuel Valls to run for the mayoralty of Barcelona in the 2019 municipal elections.