Plath is a German surname. Notable people with the surname include:
Aurelia Plath (1907–1994), mother of Sylvia Plath John Plath (born 1969), Australian rugby league footballer Max Plath (born 2001), Australian rugby league footballer Otto Plath (1885–1940), father of Sylvia Plath and entomologist Sylvia Plath (1932–1963), American poet, novelist, short story writer, essayist Sylvia Plath effect Werner Plath (1918–1945), German swimmer Wolfgang Plath (1930–1995), German musicologist
See also Plath GmbH, a German defence supplier Platt (disambiguation)