Théo Le Mercier (born 18 October 1999) is a French ice dancer.
With his skating partner, Loïcia Demougeot, he has competed in the final segment at two World Junior Championships and finished within the top eight at the 2019 edition.
He has won two silver medals at 2019 JGP France and JGP Poland, qualified for the 2019–20 ISU Junior Grand Prix Final.