Look up Cassius in Wiktionary, the free dictionary.

Cassius may refer to:

• 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 Chaerea, 1st-century Roman army soldier and officer in the Paetorian Guard and assassin of emperor Caligula
• 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

• 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

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

• Chris Hero AKA Kassius Ohno (born 1979), professional wrestler

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