John Laskaris

John Laskaris or Lascaris may refer to:


 * John IV Laskaris (1250–c.1305), emperor of Nicaea
 * John Laskaris Kalopheros (1325/30–1392), Byzantine aristocrat
 * John Laskaris (composer) (fl. early 15th century), Greek composer in Venetian Crete
 * Janus Lascaris (c.1445–1535), Greek scholar
 * Giovanni Paolo Lascaris (1560–1657), Grand Master of the Knights of Malta