The name Zellweger is a noble lineage of the Appenzell area, Switzerland, and may refer to:
People with the surname Zellweger:
- Marc Zellweger (born 1973), Swiss football defender
- Renée Zellweger (born 1969), Academy Award-winning American film actress
- Shea Zellweger (born 1925), American educator
Furthermore the name Zellweger may refer to:
- Zellweger off-peak, the brand-name of an electric switching device
- Zellweger syndrome, a rare congenital disorder