Duff
- DUF (disambiguation)
- Daf
- Down Under Fan Fund
- Duff (1794 ship)
- Duff (dessert)
- Duff (given name)
- Duff (nickname)
- Duff (surname)
- Duff Beer
- Duff Building
- Duff Hill
- Duff House
- Duff Islands
- Duff Peak
- Duff Point
- Duff River
- Duff Roman
- Duff baronets
- Duff reaction
- Duff's (disambiguation)
- Duff, Indiana
- Duff, Nebraska
- Duff, Saskatchewan
- Duff, Tennessee
- Elmyra Duff
- Karen Duffy
- Mount Duff
- Mount Duff (Yakutat)
- The DUFF
- The DUFF (novel)