Haarmann is a German surname. Notable people with the surname include:
Erich Haarmann (1882–1945), German geologist Fritz Haarmann (1879–1925), prolific German cannibalistic serial killer, rapist, and fraudster Harald Haarmann (born 1946), German linguist Mala Gaonkar Haarmann, American businesswoman Oliver Haarmann (born 1967), German private equity financier Stephan Haarmann Wilhelm Haarmann (1847–1931), German chemist
See also Haarmann, a play by Marius von Mayenburg Haarmann, a book by Theodor Lessing Haarmann Hemmelrath, a now-defunct German law firm Harman (disambiguation)