Kath is both a given name and a surname. Notable people with the name include:
Given name:
Kath Shelper, Australian film producer
Kath Soucie, American voice actress
Kath Bloom, American singer-songwriter whose sad voice often accompanies simple folk melodies
Kath Pettingill (born 1935), the matriarch of a notorious Melbourne based criminal family
Surname:
Katherine Kath (1920–2012), French ballerina and actress
Kory Kath (born 1977), American politician
Roger Kath (born 1984), Hong Kong footballer
Terry Kath (1946–1978), original guitarist, vocalist, and founding member of the band Chicago
Fictional characters:
Kath Day-Knight, character in the Australian television comedy series Kath & Kim