Ernst Hagen
Ernst Hagen is the name of the following people:
- Ernst von dem Hagen (1848–1928), Austrian Lieutenant Field Marshal
- Ernst Hagen (author) (1906–1984), Austrian actor and author
- Ernst Hagen (politician) (* 1952), Austrian politician (FPÖ)
- Ernst August Hagen (1797–1880), German writer and art historian
- Ernst Bessel Hagen (1851–1923), German physicist
- Ernst Heinrich Graf von Hagen (* 1748), German entrepreneur, privy councilor and president of the court of appeal