Ernst Klein
Ernst Klein is the name of the following people:
- Ernst Klein (journalist) (1876–1951), Austrian journalist and writer
- Ernst Klein (ethnologist) ( Ernst Immanuel Klein ; 1887–1937), Swedish writer and ethnologist
- Ernst Klein (resistance fighter) (1900–1964), German resistance fighter
- Ernst Klein (historian) (1923-2004), German historian
- Ernst Ferdinand Klein (1744–1810), Prussian lawyer