Isaac Monnier is a 19-year-old professional football player from FRA. He currently plays for Lorient, wearing the number 19 shirt. He plays primarily as a Defender.

His most recent move was a from FC Lorient U19 to Lorient B on 2024-06-30.

Throughout the Ligue 1 2025-2026, Isaac Monnier featured in 5 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.