Herz is a German surname meaning heart, and may refer to:
- Adam Herz, American writer and producer
- Adolf Herz, Austrian Engineer, inventor of Herz spark plug, photographer and first editor of Camera Magazine
- Alice Herz, American pacifist
- Henri Herz, Austrian pianist, teacher, and composer
- Henriette Herz (de Lemos), German social leader
- John H. Herz, American scholar of international relations
- Josef E. Herz, American scientist, organic chemistry
- Juraj Herz, Czech film director, writer and actor
- Martin F. Herz, American diplomat, ambassador
- Michael Herz (businessman), German businessman
- Michael Herz, American film producer, director and screenwriter
- Naphtali Herz Imber, itinerant poet, wrote lyrics of Hatikvah, national anthem of Israel
- Winfried Herz, German footballer