Sigmund or Siegmund may refer to:
People Sigmund (given name), list of people with the name Sigmund Sigmund Freud, an Austrian neurologist
Arts and entertainment Sigmund and the Sea Monsters, American 1970s TV series
Fictional characters Sigmund (also Siegmund), a hero in Norse mythology Siegmund, a focal character in Richard Wagner's Die Walküre Sigmund (comics), Doctor Sigmund, a Dutch comics character
Others , a cargo ship in service 1926-29
See also Sigismund (disambiguation) Zygmunt, a given name