Cantharus is a genus of sea snails in the family Pisaniidae.
This genus was previously placed in family Fasciolariidae by some authors. The genus is sometimes split into subgenera.
, the World Register of Marine Species accepts 14 extant and 1 extinct species in the genus Cantharus:
Cantharus elegans is present in some databases, but not the World Register of Marine Species.
Cantharus porcatus is listed as a taxon inquirendum in the World Register of Marine Species.