Ernst Theumer
Ernst Theumer is the name of the following people:
- Ernst Theumer (Bohemia) (1833–1904), Bohemian member of the Austrian House of Representatives
- Ernst Theumer (District Chairman) (1890–1978), Austrian politician (SPÖ)
- Ernst von Theumer senior (* 1926), Austrian cameraman, film producer, film director and screenwriter
- Ernst von Theumer junior (* 1949), Austrian television producer