Iosif (Sifis) Valirakis (Greek: Ιωσήφ (Σήφης) Βαλυράκης, born 1943) is a Greek politician of the historic Panhellenic Socialist Movement (PASOK) cadre. His first name, the Greek form of Joseph, is commonly represented in its Cretan diminutive Sifis ("Joe"), by which he is popularly known.