Johann Kastner
Johann Kastner is the name of the following people:
- Johann Kastner (painter) ( Johann Evangelist Kastner ; 1772 / 1776–1827), Austrian painter
- Johann Kastner (athlete) , German athlete
- Johann Baptist Kastner (1775–1841), German theologian
- Johann Georg Kastner (1810–1867), German-French composer and music writer