István Horváth (born 1935) is a former Hungarian communist politician. István Horváth may refer to: István Horváth (politician, born 1970), Mayor of Szekszárd, Hungary István T. Horváth (born 1953), Hungarian-American chemist István Horváth (athlete) (1910–1976), Hungarian athlete István Horváth (physicist) (born 1963), Hungarian physicist, astronomer