Hans Hahn may refer to:
- Hans Hahn (mathematician) (1879–1934), Austrian mathematician
- Hans "Assi" Hahn (1914–1982), German World War II Luftwaffe flying ace
- Hans Hahn (night fighter pilot) (1919–1941), Luftwaffe night fighter ace
- Hans von Hahn (1914–1957), German Luftwaffe ace