William Ziegler

William or Willi Ziegler may refer to:
 * William Ziegler (industrialist) (1843–1905), American industrialist
 * William Ziegler Jr. (1891–1958), adopted son
 * William Ziegler III (ca 1929–2008), owner of Swisher International Group and son of Ziegler Jr.
 * William Ziegler (film editor) (1909–1977), American film editor
 * Willi Ziegler (1929–2002), German paleontologist