Kassius may refer to:
Kassius Nelson (born 1997), English actress and playwright Kassius Robertson (born 1994), Canadian basketball player Kassius Konstantine, a Star Wars Imperial Navy admiral Kassius Ohno, a ring name of American professional wrestler William Spradlin (born 1979)
See also Cassius (disambiguation) Kasius, a recurring character in season 5 of Agents of S.H.I.E.L.D.