Geiss (surname)
Geiss or Geiß is a surname of German origin. Notable people with the surname include:
- Anton Geiss, German politician in the Republic of Baden
- Bill Geiss, American baseball player
- Christof Geiß, German mathematician
- Doug Geiss, American politician from Michigan
- Emil Geiss, American baseball player
- Erika Geiss, American politician from Michigan
- Imanuel Geiss, German historian
- James Geiss, American sinologist, historian, and author
- Johannes Geiss, German physicist
- Karlmann Geiß, German jurist and judge
- Louisette Geiss, American writer, lyricist, and producer
- Michel Geiss, French sound engineer, instrument designer and musician
- Robert Geiss, German businessman and TV personality
- Robin Geiss, German public international law scholar and academic
- Tony Geiss, American producer, screenwriter, songwriter and author