Guillaume Peltier (French pronunciation: [ɡijom pɛltje]; born 27 August 1976) is a French politician, former teacher and business leader, who was elected as a Member of the European Parliament (MEP) in 2024.

A former member of The Republicans, Peltier joined Reconquête to support Éric Zemmour's presidential candidacy in 2022.

Peltier is a former member of the National Front (FN) and former leader of its youth section.

Zemmour has stated Peltier joining the party would allow it to heavily increase its access into local political structures.

In the 2022 French legislative election he lost his seat after being eliminated in the first round.