2018 French Guiana's 2nd constituency by-election|
|
| Turnout | 34.76% 8.67% (first round) 41.52% 6.42% (second round) | 
|---|
 
|   | 
 | 
 | 
 |  
| Nominee | 
Lénaïck Adam | 
Davy Rimane | 
David Riché |  
| Party | 
LREM | 
LFI | 
PSG |  
1st round  % | 
5,927 43.10% 6.65% | 
4,830 35.12% 14.84% | 
1,385 10.07% 10.07% |  
2nd round  % | 
8,320 50.65% 0.44% | 
8,107 49.35% 0.44% | 
Eliminated |  
 
 
  | 
 
 | 
A by-election was held in French Guiana's 2nd constituency on 4 March 2018, with a second round on 11 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 Lénaïck Adam, candidate of La République En Marche! (REM), in the June 2017 legislative elections on 8 December 2017.
As in June 2017, Adam narrowly defeated Davy Rimane, supported by La France Insoumise, in the second round.