Arnauld Mercier (born 4 June 1972) is a French football manager and a former player.
Born in Bayeux, Mercier began playing football for Ligue 2 side Rouen in 1990.
Mercier spent three seasons with Fécamp and the following two with Valenciennes, continuing to play in the Championnat National.
He was unable to work his way into the first team and went on loan to Serie B sides Andria, Savoia and Cosenza.
He was appointed manager of Belgian side Royal Boussu Dour Borinage in April 2011.