Johann Westphal
Johann Westphal is the name of the following people:
- Johann Westphal (politician, around 1397) (around 1397–1474), German politician, mayor of Lübeck
- Johann Westphal (politician, 1886) (1886–1954), German politician (KPD), MdHB
- Johann Caspar Westphal (1649–1722), German physician
- Johann Heinrich Westphal (1794–1831), German astronomer
- Johann Jacob Heinrich Westphal (1756–1825), German organist, teacher and music collector