Marc Giacardy (15 February 1881 in Bordeaux - 28 August 1917 à la Ferme-de-Mormont, near Verdun) was a French rugby union player.
He was 1 m 75 tall and weighed 73 kg.
He played at the position of tighthead prop, fly-half, and more rarely hooker or second row, and played for Stade Bordelais.
During the 1911/12 season Giacardy refereed the final of the French Rugby Championship between, Stade Toulousain and Racing club de France.
He was a journalist by profession.
During the First World War he was stationed with the 6th Infantry Regiment, in which he was a captain.
He was killed in action at the front in 1917, at la Ferme-de-Mormont, near Verdun.