William or Willi Ziegler may refer to: William T. Ziegler (1840–1916), American politician from Pennsylvania William Ziegler (industrialist) (1843–1905), American industrialist William Ziegler Jr. (1891–1958), adopted son William Ziegler (film editor) (1909–1977), American film editor William Ziegler III (ca 1929–2008), owner of Swisher International Group and son of Ziegler Jr. Willi Ziegler (1929–2002), German paleontologist
See also William Ziegler House, mansion of Ziegler Jr. William and Helen Ziegler House, second mansion of Ziegler Jr.