Zahn is a surname. Notable persons with the surname include:
Ernst Zahn (1867-1952), Swiss writer,
Friedrich Wilhelm Zahn (1845-1904), German pathologist,
Johann Zahn (1631-1707), German canon who wrote on the camera obscura and who invented an early camera,
Johannes Zahn (1817-1895), German musicologist and theologian who developed a taxonomy of Lutheran hymns and melodies,
Paula Zahn (born 1956), American newscaster,
Peter von Zahn, (1913-2001), German author, filmmaker, and journalist,
Steve Zahn (born 1967), American actor,
Theodor Zahn (1838-1933), German biblical scholar,
Timothy Zahn (born 1951), American science fiction novelist,
Wilhelm Johann Karl Zahn (1800-1871), German architect, painter and art critic
