Herz is a German surname meaning heart. Notable people with the surname include:
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
Eberhard Herz, German American footballer
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