Geiss may refer to:
- 18032 Geiss, an asteroid
- Cristof Geiss, German mathematician
- Imanuel Geiss (1931-2012), German historian
- Johannes Geiss (1926-2020), a leading Swiss space scientist
- Geiss, Menznau, a village in the Menznau municipality, Switzerland
This disambiguation page lists articles associated with the title Geiss.
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