Cephissus
Cephissus (), Cephisus, Kephisos, or Kifisos may refer to:
Cephissus (Boeotia), a river in through northern Boeotia
Cephissus (Athenian plain), a river in Attica flowing through the Athenian plain
Cephissus (Eleusis), a tributary of the Saronic Gulf from the Eleusinian plain
Cephissus (mythology), a man changed into a sea monster by Apollo
Cephissus, a Martian canal, per List of Martian canals
Battle of the Cephissus, 15 March 1311 conflict between the Frankish Greek forces of Walter V of Brienne and the mercenaries of the Catalan Company