Johannes Hage (1842–1923) was a Danish businessman who became a philanthropist and later founder of the Nivaagaard museum.
- Occupation
- art collector, curator, entrepreneur, large estate owner
- Position held
- member of the Folketing
- Citizenship
- Kingdom of Denmark
- Born
- 1842, May 26, 1842, May 28, 1842
- Died
- January 14, 1923, 1923