Hellmann is a German surname. Notable people with the surname include:
- Claudia Hellmann (1923–2017), German contralto
- Ernesto Hellmann (1898–1952), Italian chess player
- Diethard Hellmann (1928–1999), German choral conductor and academic
- Gustav Hellmann (1854–1939), German meteorologist
- Hans Hellmann (1903–1938), German theoretical chemist
- Libby Fischer Hellmann (born 1949), crime fiction writer
- Martina Hellmann (born 1960), German athlete
- Richard Hellmann (1876–1971), German-American businessman and company founder of Hellmann's
- William K. Hellmann, former Secretary of the Maryland Department of Transportation (1984–1987)
- Steven Hellmann (born 1977), founder of Little Birdie Media and The Foodies Group, Food and Tourism Media Personality