Heidt is a surname. Notable people with the surname include:

  • Brad Heidt, Canadian curler
  • Gary Heidt (born 1970), American conceptual artist
  • Horace Heidt (1901–1986), American pianist, big band leader, and radio and television personality
  • Winifred Heidt (1906-1990), American, Detroit based Opera Singer. Broadway Performer as Carmen in 1945. Performed on NBC Television Opera Theatre in 1949. Broadway Performer in Carousel as Mrs. Mullin in 1954.
  • Mike Heidt (born 1963), German-Canadian ice hockey player
  • Peter Heidt (born 1965), German politician