Leontios Machairas or Makhairas (Greek: Λεόντιος Μαχαιράς, French: Léonce Machéras; about 1380 - after 1432) was a historian in medieval Cyprus.
The main source of information on him is his chronicle, written in the medieval Cypriot dialect, titled Ἐξήγησις τῆς γλυκείας χώρας Κύπρου ἡ ποία λέγεται Κρόνακα, τοὐτέστιν Χρονικόν (Chronicle of the sweet land of Cyprus).
Machairas was Orthodox Christian but wrote with respect for the pope and the Catholic ruling class of Cyprus for whom he was working.
There are manuscripts of the Chronicle at the Bodleian Library in Oxford, the Biblioteca Marciana in Venice, and Ravenna.
The Oxford manuscript was copied in Paphos in June 1555, according to an additional paragraph after the end of the chronicle.