Lefki () is a former municipality in the Lasithi regional unit, eastern Crete, Greece. Since the 2011 local government reform it is part of the municipality Sitia, of which it is a municipal unit. The municipal unit has an area of . Population 1,466 (2021). The seat of the municipality was in Ziros.
Kavaloi (), is a group of three uninhabited islets, close to the coast of Lasithi. The group comprises the islets Anavatis (ÃÂýñòìÃÂֈ"rider"), Kavallos (ÃÂñòìûûÿÃÂ), and Kefali (ÃÂõÃÂñûî "head"). Administratively the islets are part of the Lefki municipal unit.