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

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 RN LREM Running mate Martine Blondel Anaïs Thomas Paul Bonmartel 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%
Deputy before election Bastien Coriton PS Elected deputy Gérard Leseul PS

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.

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 (Substitute: Martine Blondel)	6,586	39.94	−1.92
	RN	Jean-Cyril Montier (Substitute: Anaïs Thomas)	2,970	18.01	−0.81
	LREM	Patricia Lhoir (Substitute: Paul Bonmartel)	1,767	10.72	N/A
	LR	Michel Allais (Substitute: Corinne Buquet)	1,601	9.71	−11.41
	G.s	Auban Al Jiboury (Substitute: Enora Chopard)	1,455	8.82	N/A
	LFI	Maxime Da Silva (Substitute: Marie-Odile Lecourtois)	1,434	8.70	−3.06
	Far left	Valérie Foissey (Substitute: Frédéric Podguzer)	391	2.37	N/A
	Others	N/A	286
Turnout			16,918	17.71	−31.37
2nd round result
	PS	Gérard Leseul (Substitute: Martine Blondel)	11,502	71.61	+2.46
	RN	Jean-Cyril Montier (Substitute: Anaïs Thomas)	4,561	28.39	N/A
Turnout			16,961	17.75	−24.29
	PS hold