Johann Rahn
Johann Rahn is the name of the following people:
- Johann Caspar Rahn (1769–1840), German painter
- Johann Heinrich Rahn (mathematician) (1622–1676), Swiss mathematician
- Johann Heinrich Rahn (historian) (1646–1708), Swiss historian
- Johann Heinrich Rahn (natural scientist) (1709–1786), Swiss natural scientist
- Johann Heinrich Rahn (physician) (1749–1812), Swiss physician
- Johann Heinrich Rahn (pharmacist) (1803–1847), German pharmacist
- Johann Rudolf Rahn (1841–1912), Swiss art historian and university professor
