Johann Oestreich
Johann Oestreich is the name of the following people:
- Johann Oestreich (entrepreneur) (1750–1833), German entrepreneur and patron
- Johann Adam Oestreich (1776–1865), German organ builder and musician
- Johann Georg Oestreich (1770–1858), German organ builder
- Johann-Markus Oestreich (1738–1833), German organ builder
