Nicholas Kalliakis (Greek: Νικόλαος Καλλιάκης, Nikolaos Kalliakis; Latin: Nicolaus Calliachius; Italian: Niccolò Calliachi; c. 1645 - May 8, 1707) was a Cretan scholar and philosopher who flourished in Italy in the 17th century. He was appointed doctor of philosophy and theology in Rome, university professor of Greek and Latin and Aristotelian philosophy at Venice in 1666 and professor of belles-lettres and rhetoric at Padua in 1667.