Cassius

Cassius may refer to:

People

 * Cassius, an ancient Roman family name, see Cassia gens
 * Gaius Cassius Longinus (died 42 BC), Roman senator and a leader of Julius Caesar's assassination
 * Avidius Cassius (130–175), usurper Roman Emperor
 * Cassius, pen-name of Michael Foot, British politician and writer
 * Cassius of Clermont (died c. 260)
 * Cassius of Narni (died 558), bishop of Narni
 * Cassius Marcellus Clay (disambiguation), several people, including:
 * Cassius Clay (1942–2016), birth name of American boxer Muhammad Ali
 * Cassius Marcellus Clay Sr. (1912–1989), father of the boxer
 * Cassius Marcellus Clay (politician) (1810–1903), American abolitionist, nicknamed the "Lion of White Hall"
 * Cassius Dio (c. AD 155 or 163/164 – after 229), Roman historian
 * Cassius D. Kalb, an American musician
 * Cassius Longinus (disambiguation)
 * Cassius Stanley (born 1999), American basketball player
 * Cassius Turvey (2007–2022), Aboriginal Australian boy killed in Perth
 * Cassius Winston (born 1998), American basketball player

Arts, entertainment, and media

 * Cassius (band), a French electronic music duo
 * "Cassius" (song), a 2008 song by Foals
 * "Cassius", a 2017 song by Fleet Foxes on the album Crack-Up
 * Cassius Chrome, a House Robot in Robot Wars
 * Cassius Bright, a character in the video game The Legend of Heroes: Trails in the Sky
 * Cassius Green, a character in the film Sorry to Bother You
 * Cassius au Bellona, a character in Pierce Brown's Red Rising series of novels

Other uses

 * Cassius (crocodile), the world's largest captive crocodile
 * Purple of Cassius, pigment used in stained-glass work