Dahn is a municipality in the Südwestpfalz District (South-West Palatinate), in Rhineland-Palatinate, Germany.
Dahn may also refer to:
- Dahn (surname)
- Dahn Ben-Amotz (1924–1989), Israeli radio broadcaster
- Dahn yoga
- Castles of Dahn, Germany
- Erlenbach bei Dahn, Germany
- Fischbach bei Dahn, Germany
- House of Dahn, noble house in Germany