Zilly is a surname. Notable people with the surname include:
Franz Zilly, German figure skater Jack Zilly (1921–2009), American football player Thomas Samuel Zilly (born 1935), American judge
Fictional characters Wolf-Rüdiger Zilly is main character from Dastardly and Muttley in Their Flying Machines. Voiced by Don Messick.
See also Lilly (surname) Zilli (disambiguation)