Leontios (or Leontius) (Greek: Λεόντιος, Latin: LEONTIVS) (died 15 February 706) was Byzantine emperor from 695 to 698. He came to power by overthrowing the Emperor Justinian II, but was overthrown in his turn by Tiberios III. His actual and official name was Leo (Λέων, Leōn), but he is known by the name used for him in Byzantine chronicles.