Octave Merlier (Greek: Οκτάβιος Μερλιέ; 1897–1976) was an expert on the Modern Greek language.

Merlier was born in Roubaix. He studied at the Sorbonne and École pratique des hautes études under the tutelage of Antonius Meillet and Joseph Vendyres.

He served as director of the Institut français d'Athènes [Wikidata] from 1938 to 1961. In 1923 he married Melpo Logotheti [Wikidata] (Μέλπω Λογοθέτη), noted for her collection of Modern Greek folk songs.

Merlier died in Athens.

Works

• Poèmes akritiques; La mort de Digénis: tragédie, a French translation of a poem by Angelos Sikelianos.
• Itinéraires de Jésus et chronologie dans le Quatrième Évangile, 1961)
• (with Melpo Merlier): Ο τελευταίος ελληνισμός της Μικράς Ασίας. Έκθεση του έργου του Κέντρου Μικρασιατικών Σπουδών, 1930-1973. Κατάλογος. ("The End of Greek Asia Minor: An Exposition of the Work of the Centre for Asia Minor Studies 1930-1973: catalogue", 1974)
• La vision prophétique du moine Dionysios, ou, La femme de Zante by Dionysios Solomos; French translation by Octave Merlier ("The prophetic vision of Dionysios Solomos The Monk, or the Woman of Zakynthos," 1987).