Hellmann is the surname of:
- Claudia Hellmann (born 1932?), German contralto
- Diethard Hellmann (1928–1999), German choral conductor and academic
- Gustav Hellmann (1854–1939), German meteorologist
- Hans Hellmann (1903–1938), German theoretical chemist
- Hellmann–Feynman theorem
- Martina Hellmann (born 1960), German athlete
- William K. Hellmann, former Secretary of the Maryland Department of Transportation
It can also refer to:
- Hellmann Worldwide Logistics