William Ziegler
William or Willi Ziegler may refer to:
- William T. Ziegler, American politician from Pennsylvania
- William Ziegler (industrialist), American industrialist
- William Ziegler [Jr.], adopted son
- William Ziegler (film editor), American film editor
- William Ziegler III, owner of Swisher [International Group] and son of Ziegler Jr.
- Willi Ziegler, German paleontologist