Septentrion may refer to:
Septentrional, a Latinate word once used in English and French to refer to northern regions Septentrionalist, referring to the Viking revival of the 18th and 19th centuries Operation Septentrion, a 2009 ISAF military operation in Afghanistan Septentrional-Oriente fault zone, a geological fault in the Caribbean
Arts and entertainment Septentrion (album), by Anodajay, 2006 Septentrión, an album by Anima Mundi, 2002 Septentrion (video game), or SOS, a 1993 video game Septentrion, a 2009 book by Jean Raspail Septentriones, fictional creatures in the video game Shin Megami Tensei: Devil Survivor 2
See also Septentrioniidae, an extinct family of jawless fish Septentrionia, a genus in the family Septentrioniidae