Ismaël Gace (born 19 September 1986) is a French football defender who plays for Haguenau.
Gace began his career at French Ligue 1 capital club Paris Saint-Germain as part of their youth set-up. In 2002, he moved to Côte d'Azur based club OGC Nice, where he was contracted until 2012. On 16 January 2009, he joined Rodez AF on loan. On 28 July 2011, he joined the Ligue 2 side US Boulogne.