Franc Žitnik (born 8 March 1941 in Ljubljana) is a Yugoslav retired slalom canoeist who competed from the late 1950s to the mid-1970s. He won a silver medal in the C-2 team event at the 1965 ICF Canoe Slalom World Championships in Spittal. Žitnik also finished 19th in the C-2 event at the 1972 Summer Olympics in Munich.
His son Boštjan represented Slovenia at the 1992 Summer Olympics where he finished 10th in the C-1 event.