In Greek mythology, Clio (// or, more rarely, //; Greek: Κλειώ, Kleiṓ; "made famous" or "to make famous"), also spelled Kleio, is the muse of history, or in a few mythological accounts, the muse of lyre playing. Like all the muses, she is a daughter of Zeus and the Titaness Mnemosyne, goddess of memory. Along with her sister Muses, she was considered to dwell at either Mount Helicon or Mount Parnassos. Other common locations for the Muses were Pieria in Thessaly, near to Mount Olympus. She had one son, Hyacinth, with one of several kings, in various myths—with Pierus or with king Oebalus of Sparta, or with king Amyclas, progenitor of the people of Amyclae, dwellers about Sparta. Some sources say she was also the mother of Hymenaios. Other accounts credit her as the mother of Linus, a poet who was buried at Argos, although Linus has a number of differing parents depending upon the account, including several accounts in which he is the son of Clio's sisters Urania or Calliope.
Clio, sometimes referred to as "the Proclaimer", is often represented with an open scroll of parchment scroll or a set of tablets. The name is etymologically derived from the Greek root κλέω/κλείω (meaning "to recount," "to make famous," or "to celebrate").
In her capacity as "the proclaimer, glorifier and celebrator of history, great deeds and accomplishments," Clio is the namesake of various modern brands, including the Clio Awards for excellence in advertising. The Cambridge University History Society is informally referred to as Clio, similarly, the Cleo of Alpha Chi society at Trinity College, Connecticut is named after the muse. 'Clio' also represents history in some coined words in academic usage: cliometrics, cliodynamics. One of the progenitors of the discipline of digital history, Roy Rosenzweig, wrote a book titled "Clio Wired: The Future of the Past in the Digital Age."
- Harvey, Paul (1984). "Clio/Kleio". The Oxford Companion to Classical Literature (Revised 1984 ed.). Oxford: Oxford University Press. p. 110. ISBN 0-19-281490-7.
- Leeming, David (2005). "Muses". The Oxford Companion to World Mythology. Oxford University Press. p. 274. ISBN 978-0-19-515669-0.
- Morford, Mark P. O.; Lenardon, Robert J. (1971). Classical Mythology. New York: David McKay Company. pp. 56–57. ISBN 0-679-30028-7.
- Pseudo-Apollodorus 3. 10.3; Pausanias 3. 1.3, 19.4
- Graves, Robert (1960). The Greek Myths. 2 (1960 revised ed.). London: Penguin. pp. 212–213.
- D. S. Levene, Damien P. Nelis (2002). Clio and the Poets: Augustan Poetry and the Traditions of Ancient Historiography. Brill Academic Publishers. ISBN 90-04-11782-2.
- "Clio". November 2, 2011. Archived from the original on June 24, 2010. Retrieved October 4, 2013.
- Carder, Sheri: "Clio Awards" The Guide to United States popular culture, pages 180-181, ISBN 978-0-87972-821-2
- Media related to Clio at Wikimedia Commons
- Theoi.com - Clio
- Warburg Institute Iconographic Database (ca 40 images of Clio)