Zahn is a German & Ashkenazi Jewish Surname. Notable persons with the surname include:
Ernst Zahn (1867-1952), Swiss writerFriedrich Wilhelm Zahn (1845-1904), German pathologistGeoff Zahn (born 1945), American baseball playerJohann Zahn (1631-1707), German canon who wrote on the camera obscura and who invented an early cameraJohannes Zahn (1817-1895), German musicologist and theologian who developed a taxonomy of Lutheran hymns and melodiesKarl Hermann Zahn (1865–1940), German botanistWilhelm Zahn (1910-1976) German U-boat commanderPaula Zahn (born 1956), American newscasterPeter von Zahn, (1913–2001), German author, filmmaker, and journalistSteve Zahn (born 1967), American actorTheodor Zahn (1838-1933), German biblical scholarTimothy Zahn (born 1951), American science fiction novelistWilhelm Johann Karl Zahn (1800-1871), German architect, painter and art critic