Franjo Frankopan Slunjski (English: Francis Frankopan of Slunj, Hungarian: Szluini Frangepán Ferenc), (*Slunj, 1536 – †Varaždin, 2 December 1572) was a Croatian nobleman from the branched Frankopan family in the 16th century. From 1567 until his death he served as Ban (Viceroy) of Croatia and was one of the most prominent figures of the fight against the Ottoman Turks and their expansion. Having been the last male descendant of the Slunj branch of the Frankopan family, he was called "the Sword and Shield of the Remnants of Illyria" (Latin: "ensis et scutum Illyrici reliquiarum", Croatian: "mač i štit ostataka Ilirije").