Karl Fries
Karl Fries is the name of the following people:
- Karl Fries (youth functionary) (1861–1943), Swedish youth functionary and author
- Karl Fries (philologist) (1867 – after 1934), German philologist, high school teacher and writer
- Karl Friedrich Fries (1831–1871), German painter
- Karl Theophil Fries (1875–1962), German chemist