Hellmann is a German surname. Notable people with the surname include:
Claudia Hellmann (born 1932?), German contraltoDiethard Hellmann (1928–1999), German choral conductor and academicGustav Hellmann (1854–1939), German meteorologistHans Hellmann (1903–1938), German theoretical chemistHellmann–Feynman theoremMartina Hellmann (born 1960), German athleteWilliam K. Hellmann, former Secretary of the Maryland Department of Transportation