People with the German surname Hamann include:
Politicians and military personnel
- A. P. Hamann (1909–1977), American politician
- Adolf Hamann (1885–1945), German Nazi general executed for war crimes
- Joachim Hamann (1913–1945), Nazi officer, Holocaust perpetrator
- Karl Hamann (1903–1973), Liberal politician in the Communist German Democratic Republic
Authors and media people
- Brigitte Hamann (1940–2016), German-Austrian historian
- Evelyn Hamann (1942–2007), German actress
- Hilary Thayer Hamann (born 1962), American author
- Ilene Hamann (born 1984), South African actress and model
- Jack Hamann (born 1954), American television correspondent and author
- Johann Georg Hamann (1730–1788), German philosopher
- Richard Hamann (1879–1961), German art historian
Sportspeople
Association football
- Dietmar Hamann (born 1973), German footballer, coach and pundit
- Erich Hamann (born 1944), East German footballer and manager
- Matthias Hamann (born 1968), German footballer
Basketball
- Steffen Hamann (born 1981), German basketball player
- Ray Hamann (1911–2005), American basketball player, mostly for the Oshkosh All-Stars
Other sports
- Birgit Hamann (born 1969), German hurdler
- Conny Hamann (born 1969), Danish handball player
- Doc Hamann (1900–1973), baseball player
- Helmut Hamann (1912–1941), German 400 metres runner
- Lars Hamann (born 1989), German javelin thrower
- Monika Hamann (born 1954), East German sprinter
- Svend Hamann (born 1940), Danish chess master
Other
- Christel Hamann (1847–1948), German inventor of mechanical calculators etc.
- Johanna Hamann (1954–2017), Peruvian sculptor
- Stephan Hamann, American psychology professor