2020 Seine-Maritime's 5th constituency by-election

A by-election for Seine-Maritime's 5th constituency was held in September 2020. Politically the seat has remained a solid bastion for the Socialist Party. In 2017 the seat was a rare example of them retaining a seat.

2020 Seine-Maritime's 5th constituency by-election

20 September 2020 (first round) 27 September 2020 (second round)
Turnout	17.71% (first round) 17.75% (second round)
Nominee Gérard Leseul Jean-Cyril Montier Patricia Lhoir Party PS National Rally LREM 1st round % 6,586 39.94% 1.92% 2970 18.01%0.81% 1,767 10.72% 2nd round % 11,502 71.61% 2.46 4,561 28.39% excluded
Deputy before election Bastien Coriton PS Elected deputy Gérard Leseul PS

The deputy, Christophe Bouillon was elected mayor of Barentin on 28 May 2020 and resigned from the National Assembly on 18 June because of cumulation of mandates. His substitute, Bastien Coriton, was also elected mayor in Rives-en-Seine, so resigned from the assembly five days after taking office. A by-election was called for 20 and 27 September 2020.

Gérard Leseul of the socialists was elected in the second round.

By-election Result

2020 by-election: Seine-Maritime's 5th constituency

Party		Candidate	Votes	%	±%
	PS	Gérard Leseul	6,586	39.94	-1.92
	RN	Jean-Cyril Montier	2,970	18.01	-0.81
	LREM	Patricia Lhoir	1,767	10.72	N/A
	LR	Michel Allais	1,601	9.71	-11.41
	G.s	Auban Al Jiboury	1,455	8.82	N/A
	FI	Maxime Da Silva	1,434	8.70	-3.06
	EXG	Valérie Foissey	391	2.37	N/A
	Others	N/A	286
Turnout			16,918	17.71	-31.37
2nd round result
	PS	Gérard Leseul	11,502	71.61	+2.46
	RN	Jean-Cyril Montier	4,561	28.39	N/A
Turnout			16,961	17.75	-24.29
	PS hold