Cassius
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Cassius may refer to:
People
Ancient world
- 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 Chaerea, 1st-century Roman army soldier and officer in the Praetorian Guard and assassin of Emperor Caligula
- Cassius Dio (c. AD 155 or 163/164–after 229), Roman historian
- Cassius Longinus (disambiguation)
- Cassius of Clermont (died c. 260), Roman senator and Christian martyr
- Cassius of Narni (died 558), Bishop of Narni
Modern world
- Cassius Clay (1942–2016), birth name of American boxer Muhammad Ali
- Cassius Marcellus Clay Sr. (1912–1989), father of the boxer
- Cassius Marcellus Clay (1810–1903), American abolitionist, nicknamed the "Lion of White Hall"
- 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, pen-name of Michael Foot, British politician and writer
- Saint Cassius (musician), stage name of American musician Khalil Walton
Fictional characters
- Cassius au Bellona, in Pierce Brown's Red Rising series of novels
- Cassius Bright, in the video game The Legend of Heroes: Trails in the Sky
- Cassius Chrome, a house robot in Robot Wars
- Cassius Green, in the film Sorry to Bother You
Music
- Cassius (band), a French electronic music duo
- "Cassius" (song), a 2008 song by Foals
- "Cassius", a 2017 song on the album Crack-Up by Fleet Foxes
Other uses
- Cassius (crocodile), the world's largest captive crocodile